...
The two 2.4GHz antennas allow the ESP32-PICO and ESP-01F to be flashed over WiFi for ease of updating. It’s also the ESP-01Fs primary method of wireless communication when acting as a backpack.
Block Diagram
| Drawio | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Programming the Gemini TX
The ESP32 on the board can be programmed in 1 of 2 ways: USB (UART) or WiFi. The process for programming it using these methods is explained below.
First, regardless of which method you are using, the ESP32’s BOOT0 pin must be pulled low. This is done by placing a jumper on J6. This puts the ESP32 in boot mode.
With the ESP32 in boot mode, open the ELRS configurator on a computer and configure it as follows:
...
If programming over WiFi, select the WiFi option in the ELRS configurator and upload the code. If unable to complete the flash over WiFi, you may need to flash it over USB instead
If programming over USB, first place jumpers on J2 and J4 to bridge pins 2 and 3 on each of the headers (the bottom row of 2 headers). Then plug in a USB cable between the PCB and a computer and select the UART option in the ELRS configurator, then upload the code.
Design Files & Models
Mechanical Models
...