In my previous article on the Heltec LoRa 32 V4 test result, I subjected this Meshtastic node to a description, but more importantly, to a series of rigorous technical tests: radio architecture, transmission power, reception sensitivity, energy consumption, and real-world performance. I demonstrated that this platform, equipped with an ESP32-S3R2 microcontroller and an SX1262 chip with an external amplifier, can achieve useful power levels (up to ~27 dBm in a configuration compliant with European standards) while maintaining relatively low power consumption during standby and wake-up phases.
These results showed that the V4 performs well in terms of connectivity and Meshtastic stability , and that it provides a reliable foundation for network deployments. However, its "experimental" form factor and ergonomics remain those of an electronic assembly board: if I want to use it in the field, in mobile situations, or for practical applications, certain limitations therefore arise.
For this purpose, the Heltec WiFi LoRa 32 Expansion Kit exists: it doesn't modify the V4's performance, but offers a version adapted for practical and mobile use, with a more accessible interface and improved ergonomics. This article presents this kit ( Unboxing ) focusing on its field utility, ergonomics, interface, and concrete benefits for a Meshtastic user . Its role isn't to add obscure features: it serves to transform a high-performance module into a mobile tool , ready to be carried in a backpack, deployed on a ridge, a high point, an improvised mast, or a suitable tripod.
This article therefore presents this kit by focusing on its field utility, its ergonomics, its interface and the concrete benefits for a Meshtastic user .
The first thing that strikes you about the Expansion Kit is its ability to be used immediately, without complex installation . The integrated battery allows for several hours to a full day of operation without an external power supply, and the rigid yet lightweight casing makes the node easily portable with its belt clip. It can be slipped into a bag, placed on a flat surface, or held in your hand to control the Meshtastic network. This portability transforms a technical module into an operational tool , usable right out of the bag. Like its competitors, it boasts a relatively compact size and weight.
One of the major advantages of the Expansion Kit is that it allows the use of a Meshtastic node without constantly relying on a computer or phone . The kit actually offers three complementary interaction methods , covering both rapid diagnostics and routine operation.
1️⃣Standalone use with the native firmware interface
The Meshtastic firmware already includes a minimalist interface, designed to work:
with the physical buttons , . with touchscreens , depending on the type of screen, . via short presses / long presses to access essential functions. . This interface allows you to: without any further assistance.
check the node status, . check the network connection, . display simple information (messages, neighbors, radio status), . trigger certain basic actions.
In practice, this addresses a simple need: To be able to control the node and understand what it is doing , even if the smartphone remains in the bag or has no battery.
It's not visually spectacular, but it's reliable, understated, and sufficient for most usage scenarios.
2️⃣MUI: A richer, fully touch-sensitive interface
The MUI (Meshtastic User Interface) mode provides an additional layer, more modern, more readable and designed for the kit's touch screen.
The display now reads:
more graphic,. better structured,. closer to a small embedded application.
MUI allows, in particular:
smooth navigation between menus,. a clearer visualization of nodes and messages,. a better understanding of network activity.
The benefit is twofold:
Immediate understanding : we “see” what is happening more quickly.. Field decision : we can decide to move the node, adjust a position, or simply check that everything is rotating correctly.
In practice, MUI truly transforms the kit into a portable monitoring terminal , usable without mediation.
3️⃣ Connexion Bluetooth via l’application smartphone
Third option: Bluetooth connection with the Meshtastic app. Here, the kit becomes the heart of the system, but it relies on the smartphone for:
manage messages,. configure the node,. view history,. manipulate advanced settings.
The advantage is obvious: When you need to go further, everything is done from the application, wirelessly, and without having to plug anything in.
Bluetooth therefore allows:
a finer configuration. comfortable typing. and extensive control.
The kit retains its autonomy, but the smartphone becomes a control tablet .
To put the Heltec WiFi LoRa 32 Expansion Kit to the test , I wanted to move beyond theory and conduct a real-world trial. So I climbed to a high point, around 200 meters above sea level, located approximately ten kilometers from one of my modules. The objective was simple: to verify whether, under favorable conditions, the Heltec V4 equipped with the expansion kit remained truly usable for significant long-distance communication.
The result was more than convincing. From this elevated position, I was able to communicate easily with my residential module. Messages were transmitted quickly, without any unusual delays, and the communication remained perfectly smooth. This confirms that with minimal clearance, the system's practical range becomes very impressive, even without an optimized fixed installation.
But the experiment didn't stop there. By observing the grid, I also began to detect several distant nodes. From the Hérault region, I saw modules appear located in the Vaucluse, the Gard, and the Bouches-du-Rhône.
This is not a scientific measurement campaign, but rather a concrete indicator : The Meshtastic/Gaulix network exists, it is alive, and it becomes visible as soon as you gain a little altitude.
These observations highlight one key point: the range is highly context-dependent. A few extra meters of altitude radically change the experience. One becomes not only able to communicate with a module some ten kilometers away, but also to perceive the larger network structure—in this case, the Gaulix radio mesh —as it operates and propagates across the territory.
Conclusion: A powerful platform, finally usable in the field
With the Expansion Kit, the Heltec WiFi LoRa 32 V4 takes on a whole new dimension. In my previous article, I demonstrated that this module was already remarkable from a technical standpoint: high transmission power, efficient radio sensitivity, stability, and reasonable power consumption. In other words, the V4 has a real performance reserve, capable of supporting Meshtastic exchanges in sometimes demanding environments.
What the kit offers isn't "more power" or "more range." The radio itself remains the same, with its inherent qualities. The difference is that this performance finally becomes useful for everyday mobility .
Thanks to the casing, integrated battery life, onboard interfaces, and Bluetooth, I can truly utilize this radio capability in the field: testing, observing, exchanging information, climbing to a high point, and understanding how the network behaves. It's no longer just a laboratory module; it's an operational tool.
In the future, I will continue testing — particularly with finer measurements (RSSI, SNR, link regularity) and in varied environments.
P.S.
The original article was written by a French user, and we have obtained permission to republish it.
If you would like to read the original article in French, you can view it here.
The Dinoken Wildlife Reserve in South Africa is a vast area where rhinos, elephants, antelopes, and other wild animals roam freely. However, the presence of poachers has recently posed an increasing threat to their safety. Poachers often cut through the reserve's iron fence at night, and the damage isn't discovered until the next morning—by which time the precious wildlife is often already dead. Rangers struggle to track poachers and detect gunfire, making it difficult to stop poaching before it occurs.
To address this problem and curb poaching at its source, WILD, in collaboration with SPOTS and the Dinoken Wildlife Reserve, developed a fence intrusion detection system called FenceRanger. This low-power, long-range communication system is specifically designed for large wildlife reserves. They installed one system every 1 to 2 kilometers along the reserve's motorized outer fence, continuously monitoring voltage changes.
If the fence is breached, the system sends an alert to rangers' devices via a LoRa network within approximately 3 seconds—even indicating the exact location of the damage. It also connects to WILD's AirRanger drone (a fully automated fixed-wing surveillance drone), allowing rangers to intercept poachers before they approach endangered animals. The device can even detect minute vibrations in the fence; if someone cuts a wire or knocks down a fence, the signal is transmitted directly to the ranger's screen via their self-built LoRa network.
The system is solar-powered, allowing it to operate autonomously. It operates 24/7, regardless of the environment's harshness—from the frigid winter nights to the scorching heat of South African summers, which can exceed 40 degrees Celsius.
This system has revolutionized the way rangers work. Previously, they could only patrol and investigate after incidents occurred; now they can prevent problems from happening in advance. Dealing with poachers is also safer due to the reduced unknown risks. Furthermore, fence repairs have become much easier—the system accurately informs rangers of the location of damage and the parts requiring immediate repair.
Back in December 2024, they installed the first eight test systems at the Dinoken Wildlife Sanctuary. Over the past year, they deployed 40 FenceRanger devices there, all of which passed reliability testing in real-world field environments. They also built a complete LoRa communication network covering the entire area, and the project is gradually transitioning from the testing phase to full deployment. The plan is to achieve full coverage of the 160-kilometer-long fence of the Dinoken Conservation Area by early Q2 2026. In the future, they hope to use Dinoken as a first large-scale example to promote this system to other protected areas around the world, allowing more wildlife areas to benefit from this technology.
In developing FenceRanger, they followed five key principles: low power consumption, long-distance communication in the absence of mobile networks, hardware adaptability to harsh field environments, modular and upgradeable PCB structure, and affordable pricing for use in large protected areas.
Heltec developed the core component of the system—the HT-CT62 (ESP32-C3 + SX1262 LoRa) module. It serves as the system's "communication heart," supporting a three-dimensional protection architecture that includes ground detection, cloud-based early warning, and aerial coordination, thereby meeting all key design objectives. The ultra-low-power device continuously monitors the fence and, upon detecting anomalies, sends an alert with location information via the LoRa network. Meanwhile, the AirRanger drone transmits real-time aerial footage to assist rangers.
The system uses wireless LoRa networking, eliminating the need for complex wiring. This significantly reduces fence setup time, saves initial costs, is highly adaptable to field environments, reduces the need for equipment maintenance and replacement, and lowers long-term operating costs.
FenceRanger allows rangers to receive alerts within seconds and work in conjunction with the drone, shifting from "remedial" to "preventative" measures, making responses faster and safer. The next version of the system will utilize the WiFi LoRa 32 (V4) platform, improving communication while maintaining low power consumption. Its modular design means rangers can update firmware and upgrade basic functions without replacing all hardware.
WILD and Heltec state that FenceRanger fills a gap in wildlife conservation technology. Heltec provides robust and cost-effective technical support to organizations like WILD, making technology accessible and sustainable, lowering the barriers to use, and creating a virtuous cycle between technology and practical application.
The project's larger goal is to protect all life, prevent habitat fragmentation, and stop biodiversity loss. This replicable and scalable technology aims to become a global model for wilderness conservation—helping technology and nature coexist harmoniously.
For some time now, we've been exploring the potential uses of Meshtastic and how this type of network can enhance our autonomy. To delve deeper, it's essential to examine the hardware that makes these communications possible. The Heltec LoRa 32 V4 is one of the newcomers to the market, and it deserves to be put through its paces.
The goal here is not to offer a quick opinion, but to understand what this node truly brings to the table: radio architecture, transmission power, sensitivity, power consumption, thermal behavior, and results obtained in the field. We will compare the technical specifications with real-world applications to determine under what conditions this module can become a relevant choice for a resilient Meshtastic network.
In other words, we will test, measure and analyze (with enough technical expertise to inform decisions, but without unnecessarily complicating things).
The Heltec V4 uses the Semtech SX1262 radio chip paired with an external power amplifier ( PA GC1109 ). This combination theoretically allows it to reach up to 28 ± 1 dBm on the European LoRa band, a significant improvement over older modules based on the SX127x series with a typical output power of 21 ± 1 dBm . The theoretical advantage of this architecture is the ability to transmit over longer distances when needed, while maintaining very low power consumption when the equipment is in standby mode.
In practice, the external amplifier only really consumes power during high-power transmissions; as long as the node is listening or in standby mode, the energy demand remains moderate. However, it should be kept in mind that regularly transmitting at 27 dBm increases power consumption and can cause some internal heating of the module, which may temporarily affect observed values such as RSSI or SNR ( RSSI simply indicates how strong the signal is at the antenna, while SNR shows how well it stands out from the noise. If either one degrades, the communication becomes less reliable).
Where the SX1262 chip also excels is in signal quality. Its more precise oscillator and reduced phase noise improve frequency stability and make communications more reliable, even in environments where obstacles degrade reception. This is where another key component comes in: the LNA (Low Noise Amplifier). Unlike the power amplifier, which is used to "speak louder ," the LNA is located on the receiving side and is used to "hear better ." It amplifies very weak signals while adding as little noise as possible, which improves the overall sensitivity of the receiver and increases the chances of decoding distant or weak messages. In other words, the PA helps to reach further when transmitting, while the LNA enhances listening capabilities (both contributing to a more stable effective range).
The SX1262's flexibility also allows for easy adjustment of radio parameters, enabling a balance of range, throughput, and power consumption depending on the scenario ( Meetstastic Presets ). Its very fast switching between receive and transmit improves network responsiveness and reduces collisions, while its sensitivity, which can reach down to approximately -148 dBm in certain configurations, allows it to pick up extremely weak signals. In theory, all of this translates to better range and fewer lost packets , provided that attention is paid to the heat generated at high power and that real-world performance is validated through field measurements.
The Heltec V4 is based on a separate radio architecture for reception and transmission, optimized for range and reliability.
Reception (RX):
Low noise amplifier (LNA) dedicated to reception. Theoretical sensitivity SX1262: up to –148 dBm (SF12 / BW125 kHz). Practical effect: better reception of weak signals and more stable communications.
Emission (TX):
SX1262 base power: up to 22 dBm . Fixed hardware attenuation: approximately -17 dB . External amplifier: PA GC1109 . Maximum advertised power: up to 28 dBm (depending on settings and conditions). In France, the maximum must not exceed 27 dBm ( 500 mW ERP = 27 dBm EIRP ).
2.1 Analysis of the energy consumption of the Heltec V4
Following a series of comparative tests carried out both via USB-C and via the Vin battery input (with 2 Li-Ion model 18650 batteries in parallel), with a strictly identical configuration:
Gaulix configuration (LM, SF:11, CR:4/8, BW:125kHz) Customer Role Power Saving activated. Transmission power set at 27 dBm, GPS declared as NOT_PRESENT Bluetooth disabled .
Once the test conditions were stabilized and reproducible, laboratory measurements revealed a floor current consumption of approximately 12 mA in deep standby . During radio standby, the consumption exhibited transient spikes to approximately 115 mA for about ten seconds , corresponding to the system's wake-up and the LoRa transceiver's reactivation.
During transmission, with the power set to 27 dBm, current draw becomes significantly more pronounced, with peaks approaching 1 A for approximately one second . This behavior is consistent with the activation of the power amplifier (GC1109) and the characteristics of the SX1262 when the RF stage is operating at full power.
After 24 hours, the Heltec v4 node in the minimalist configuration mentioned above:
The goal was to measure the cumulative weighted energy consumption of the Heltec V4 over 24 hours during its various phases: deep sleep, receive, and transmit. This consumption is heavily influenced by the duty cycle and radio conditions, including retransmissions, collisions, and acknowledgments (ACKs). It's important to note that the node was naturally exposed to Meshtastic/Gaulix traffic , relayed by my MQTT gateway, which adds a real and dynamic context to the measurements. This approach provides a practical view of average consumption under usage conditions similar to those of a local mesh network.
I ran another series of tests with Bluetooth enabled. During my previous tests, the difference between Bluetooth enabled and disabled seemed unusual. To eliminate any doubt, I therefore ran a new complete batch, this time letting the Heltec V4 reach its breaking point and reboot.
It appears that below 3.45V , operation becomes erratic: a slightly high current draw (acknowledgment, telemetry, RF burst, etc.) is enough to trigger a reboot of the ESP32. In my specific case, the reboot occurred at 3.40V , or about 18% battery charge , after 46 hours and 40 minutes of continuous operation.
P.S.
During this period, the actual capacity used was approximately 4429 mAh , corresponding to an average consumption of around 95 mA . This is roughly double the consumption measured with Bluetooth disabled , confirming the significant impact of BLE on energy consumption.😊
Operational context of the test
Power supply: 2 x 18650 3000 mAh batteries in parallel Bluetooth: enabled permanent exhibition at my MQTT gateway ( Fr_Blabla ) active periodic telemetry approximately a dozen BLE connections approximately thirty LoRa TX messages
In summary: Bluetooth remains usable, but its energy cost is real. For long-term battery deployment, it should be considered a premium service, to be activated only when needed.
2.2 Measurement of effective power
To measure the actual power emitted by the Heltec V4, I used a TinySA Ultra Plus spectrum analyzer with a 40 dB / 10 Wmax attenuator inserted between the transmitter and the device to protect it from an excessively strong signal. The screenshot below shows a measured power of 25.6 dBm , with an accuracy of ±2 dBm. It also shows the power peaks corresponding to the module's actual emissions , allowing for a concrete visualization of the signal dynamics during transmissions and verification of its behavior under real-world conditions.
Considering the calibrated reality of the attenuator and the margin of accuracy of the analyzer, with this measurement, the officially announced power level can be considered real.
P.S.
Competitive position: Today , on the market, the Heltec V4 is one of the few Meshtastic nodes offering such high output power . No other module certified for Europe combines both Meshtastic compatibility and this level of transmission power, making the Heltec V4 the preferred choice for those seeking a node that is both high-performing and compliant with existing standards.
Through measurements and tests, the Heltec V4 is gradually establishing itself as a credible platform for deploying autonomous Meshtastic nodes powered by battery and solar panels. Despite its notoriously power-hungry ESP32 microcontroller and an RF stage reaching 27 dBm, its energy consumption remains surprisingly manageable. Sleep phases, radio wake-ups, and transmission peaks follow a reproducible pattern, allowing for more confident prediction of actual power consumption and thus proper sizing of the power supply chain.
note
As an order of magnitude, going from a node configured at 22 dBm to a Heltec V4 at 27 dBm does not represent “a small step up”, but about three times more emitted power .
In this context, the Heltec V4 is no longer limited to purely experimental use. When properly configured, installed correctly, and connected to a coherent power system, it can reliably fulfill its role as an infrastructure node while providing robust radio coverage. Adding an external, Meshtastic-compatible RTC clock, such as the PCF8563, would further enhance this capability: by stabilizing time management during deep sleep phases, it optimizes wake-ups, avoids unnecessary activations, and directly contributes to preserving battery life.
In summary, what appears on paper as a powerful but power-hungry card turns out, in reality, to be a platform surprisingly well-suited to off-grid scenarios (provided that energy is approached as a component of the system in its own right, and not as a simple accessory).
Let's take a concrete example. Imagine a Meshtastic node based on a Heltec V4, installed outdoors, and powered by a small 10W solar panel combined with two 21700 Li - ion batteries (e.g., 2 x 4800mAh) mounted in parallel.
In this configuration, the two 21700s act as a true buffer. Their higher capacity and low internal resistance allow them to easily handle the near 1 A peaks generated during 27 dBm transmissions, while preventing the sudden voltage drops that can cause the node to restart. Meanwhile, the 10 W panel doesn't attempt to power the system in real time; it recharges gradually, as sunlight becomes available.
On a typical day, solar production can be sufficient to replenish the energy consumed, especially if the software configuration limits unnecessary wake-ups and optimizes standby periods. And when the weather deteriorates—overcast skies, snow, partial shade—the dual 21700 battery pack ensures continuity, significantly delaying the drop to the critical threshold around 3.2V. The system then functions as a coherent whole: the panel recharges gradually, the battery absorbs fluctuations, and the node maintains its radio availability.
Because the cells are connected in parallel, the voltage remains stable, the solar controller operates within a comfortable range, and the average depth of discharge decreases, thus extending battery life. This example illustrates a simple yet robust architecture: a Heltec V4, two 21700s, an MPPT , and a 10W panel form a realistic basis for a truly self-sustaining Meshtastic infrastructure node.
The measurements presented here constitute a first step. They will be supplemented by real-world field tests to compare theoretical and laboratory data with the constraints of the outside world. Furthermore, a dedicated article will soon be published on the integration of the Heltec LoRa 32 V4 into the "Mobile" expansion kit , the WiFi LoRa 32 Expansion Kit ( Heltec link ), allowing exploration of mobile applications and the hardware expansion possibilities offered by this module.
A unit that expresses power in milliwatts on a logarithmic scale. It describes the electrical energy actually sent by the device to the antenna .
0 dBm = 1 mW 10 dBm = 10 mW 20 dBm = 100 mW: Each +10 dBm multiplies the power by ten . This is the base value from which everything else is calculated.
The unit expressing the gain of an antenna relative to an ideal isotropic antenna . The dBi does not create any additional power ; it directs and concentrates energy in certain directions to improve effective range. A high-gain antenna is not "more powerful," it is more directional .
RSSI – Received Signal Strength Indicator for LoRa
The strength of the signal actually received by the device, expressed in dBm (always negative). This is the “perceived power” on the receiving side.
-30 to -60 dBm : excellent -60 to -90 dBm : acceptable / reliable -90 to -120 dBm : reception limit, strongly dependent on the spreading factor and the band used
Ratio between the received signal and the surrounding noise, expressed in dB. Unlike other radio technologies, LoRa can decode a signal even with a negative SNR , thanks to its chirp spread spectrum (CSS) modulation .
Typical SNR LoRa beach:
0 dB : very good signal 0 to -10 dB : weak but usable signal -10 to -20 dB : decodable according to the spreading factor (SF) < -20 dB: almost impossible
Example minimum SNR per SF (Semtech SX126x): SF7 → –7.5 dB | SF8 → –10 dB | SF9 → –12.5 dB | SF10 → –15 dB | SF11 → –17.5 dB | SF12 → –20 dB
The higher the SF, the better LoRa can recover a signal buried in noise.
The Spreading Factor defines the number of symbols used to encode each bit in the LoRa CSS modulation.
The higher the SF , the more each bit is spread over several symbols, which lengthens the frame duration . A longer frame increases the range and allows decoding of signals even with a negative SNR , but reduces the throughput . Typical values range from SF7 to SF12 , with SF12 offering the maximum range but the minimum throughput.
The EIRP corresponds to the theoretical power radiated by the "transmitter + antenna" system. It is calculated as follows: EIRP = Power (dBm) + Antenna Gain (dBi) – losses (cables, connectors).
This is the value used by regulations because it reflects the actual effect of the antenna in space.
An alternative version of EIRP, based not on an isotropic antenna but on a half-wave dipole . In practice, we consider: PAR or ERP = EIRP – 2.15 dB.
The logic remains the same: it is an estimate of the actual radiated power, but with a different reference.
what the device actually emits (dBm), what the antenna does with this energy (dBi), what the other device receives (RSSI), in what “cleanliness” it receives it (SNR, LoRa only), the duration and range of the frames (SF, LoRa only), and what power is actually sent into the environment (PIRE/ ERP).
From a regulatory perspective, most LoRa regions manage devices based on the maximum EIRP.
Application to Meshtastic in band 869.4–869.65 MHz
The region setting in Meshtastic is primarily used to adjust the frequency and duty cycle rules, but it does not limit the module's transmission power. To comply with regulations, you must therefore manually adjust the power based on the antenna and signal loss.
In the European Union, and therefore in France, Decision 2006/771/EC as amended (band no. 54) authorizes:
500 mW PAR = 27 dBm WORSE EIRP
This means that:
If your antenna has a gain of 2 dBi And that your cable loses 0.5 dB → Your module output power should be set to around 25.5 dBm to comply with 27 dBm EIRP.
This project was created as a response to the recurring problem of wildfires in my country, Honduras. Every year, thousands of hectares are lost, and one of the most affected areas is La Tigra National Park. Beyond being a protected biodiversity zone, La Tigra is the main water source for the capital city, so early detection of fire activity is critical.
The project aims to show the viability of a low-cost LoRa-based mesh network capable of monitoring air quality in real time across forested areas. The goal is to detect the early signs of a fire before it becomes large enough to cause irreversible damage.
The idea began with an earlier prototype based on an RP2040, an RTC module, traditional LoRa point-to-point communication, and a Sharp GP2Y smoke sensor. The prototype demonstrated that early smoke detection was possible, but it lacked the characteristics needed for a real deployment: energy efficiency, long communication range, and mesh networking. This led to the new design using the Heltec V3 and the BME688 sensor, which better fits the requirements of a forest-scale deployment.
Preparation
Below is the list of items required for the project, with the exact quantities used and the purchase links for replication.
The project uses one Heltec V3 configured as a sensor node, another as a router, and a third as the receiving gateway. Meshtastic version 2.5.4.8d288d5 was used for the sensor node because it allows shorter telemetry intervals required for this application.
The BME688 sensor is read by the sensor node using the Meshtastic I²C direction pins (GPIO 41 for SDA and GPIO 42 for SCL). The sensor node transmits telemetry over LoRa. The router relays the packets deeper into the mesh, and the gateway node forwards the packets to a local Mosquitto MQTT server. Node-RED processes the incoming data.
Two improvements are proposed for future versions, and these are optional approaches:
Modify Meshtastic firmware to support a pretrained BSEC model on the BME688, trained on clean air and smoke.
Add a secondary microcontroller dedicated to smoke detection logic, sending only the relevant alerts to the V3 via UART.
A third proposal is to replace Meshtastic entirely across the entire system. This would allow the use of a very low-power custom firmware and a communication strategy focused strictly on meeting long-term energy requirements, rather than depending on Meshtastic’s operational model.
Below are the measured average current consumption values:
Router node:
Standby: 11.1 mA
Window after data reception (every 1–3 seconds): approximately 130 mA
During active packet reception: 174 mA
Sensor node:
Standby: 98 mA
During LoRa transmission: 170 mA
All measurements were taken using default Meshtastic roles without deep firmware modifications.
Finished project showcase / Summary
Although the system is still under development, The current implementation demonstrates that BME688 gas measurements, can be transmitted through a local LoRa mesh, and forwards the data to an MQTT server for processing. Although the current implementation is simple, it demonstrates that a distributed private mesh can operate reliably in forest environments to support early detection of fire activity.
The main areas for future improvement include:
Replacing the default Heltec antennas with higher-performance long-range models suitable for forest terrain.
Replacing the Heltec V3 with the Mesh Node T114, which offers significantly better energy efficiency and direct solar-panel support.
Implementing intelligent smoke-detection logic using either a modified Meshtastic firmware or independent microcontroller firmware.
A watchdog-like mechanism that detects silent nodes and automatically triggers a fallback alert if communication is lost.
The Node-RED flow is expected to provide visualization of system states, warnings, and alarms, helping users understand environmental changes in real time and act if needed.
The project shows that early wildfire detection using low-cost mesh networks is achievable and practical. With further optimization and better energy management, these systems can be deployed across large protected areas to help prevent major environmental losses.
December 23, 2025 – As Christmas bells ring in and the New Year approaches, Heltec Automation, a globally leading provider of IoT and open-source hardware solutions, today announced the launch of its annual "Christmas Gifts, New Year Ideas" dual-festival promotion. The campaign will warmly begin on December 24, 2025, and run through January 5, 2026. Designed as a special seasonal gift for the global developer and maker community, this promotion features carefully structured tiered discounts, aiming to help every innovator equip themselves with the ideal "tools for creation" during this festive season and step confidently into their 2026 projects.
The LoRa Gate PCB is a custom controller board for wireless, battery-powered LED gates, built around the Heltec HT-CT62 module (ESP32-C3 + SX1262 LoRa). It is designed for applications where multiple LED “nodes” need to be controlled reliably over long distances with minimal wiring – for example FPV race start/finish gates, illuminated track elements, or interactive light installations.
The board combines WLED, LoRa and a robust power stage into a compact, production-ready form factor.
Invasive species introduced by humans threaten native fauna and flora through their unchecked spread. Therefore, invasive species must be monitored and, if necessary, relocated. LoRaHunt is a project to monitor the live traps required for this purpose.
Recently, Heltec received a special letter. The sender was Lenley Ngo from Louisiana, USA, a key maintainer of the "Louisiana Mesh Community." The letter described how hurricanes repeatedly destroyed cellular networks, separating families and hindering rescue efforts. "Our only means of communication is walkie-talkies, and cellular network repairs will take weeks," Lenley wrote. The letter didn't make many requests, but rather conveyed a heavy responsibility and a clear plan: to use decentralized mesh networks to leave a lifeline for the most dangerous times. Today, Heltec solemnly announces: we will support the Louisiana Mesh Community, becoming the technical backbone for these "guardians in the storm."
