Wifi Kit 32 Hardware Update Logs

V1

• First release
• 2017-06-01 public sale
• Pinout diagram for V1
• Schematic diagram for V1

V2

• 2019-05 public sale;

• Fixed charging status (orange LED) blinking problem;

• 4MB (32M-bits) FLASH upgrade to 8MB (64M-bits) FLASH;

• Better 2.4GHz antenna design and impendence matching;

• Basic low power design (800uA in deep sleep);

• Add battery power detection circuit. Use ADC2_4 (GPIO 13) to read battery voltage;

• Add Vext power output pin, users can use this pin to drive some external device (sensor, motor etc.), when system need into deep sleep mode, Vext can be turn off. This pin was controlled by GPIO21, for example:

• Turn ON: digitalWrite(21, LOW);

• Turn OFF: digitalWrite(21, HIGH);

• Circuit optimization, system more stable;

• Better power manage system design.

• Pinout diagram for V2;

• Schematic diagram for V2;

V2.1

• 2019-10 public sale;
• Fix battery voltage read can't work together with Wi-Fi bug, change battery voltage reading pin to GPI37 (use ADC1_1), please refer to this example: ADC_Read_Voltage/Battery_power.
• Pinout diagram for V2.1;
• Schematic diagram for V2.1;

V3

• 2022-09-15 public sale
• MCU is changed from ESP32-D0WDQ6 to ESP32-S3FN8. Specific differences of MCU are shown in：https://products.espressif.com/#/product-comparison.
• USB interface changed from Micro USB to Type-C.
• The size, appearance, pin layout and power pins remain unchanged, but the GPIO sequence has changed. Please refer to Pinout diagram.
• Pinout diagram of V3.
• Schematic diagram of V3.