Add WIP support for BETAFPV ELRS Micro TX Module 2.4G (500/1000 mw) with ESP32 CPU

Development
1

ESP32 8MB Flash 2.4 Ghz LoRa 0.96" OLED

BetaFPV-ExpressLRS-Micro-JR-TX-module-IMG_6257
BetaFPV-ExpressLRS-Micro-JR-TX-module-IMG_62571620×1080 345 KB

Initial support for BETAFPV ELRS Micro TX Module 2.4G with ESP32 CPU

image
image1491×2072 177 KB

Working

OLED
2.4G SX128X Radio
FAN
5D-Joystick button

Known Issues

  • Display needs to be rotated after startup
meshtastic --port /dev/ttyUSB0 --set display.flip_screen true
  • Has RGB LED_WS2812 which is not a standard LED
2

Support has been merged in the develop branch

To flash firmware you will need to adjust jumpers back of device

1 and 2 ON - Enable Flash firmware via USB

3a8e12baa0d2aaa68530af275b836c8e_96b960d8-2a1e-4d50-9da4-172a2bc6cb96_600x600

Here are some ExpressLRS(firmware) temperature pictures when using the device

BetaFPV-ExpressLRS-Micro-JR-TX-module_2109341450148063323_n
BetaFPV-ExpressLRS-Micro-JR-TX-module_2109341450148063323_n1600×1600 221 KB

BetaFPV-ExpressLRS-Micro-JR-TX-module_6805744582343864969_n
BetaFPV-ExpressLRS-Micro-JR-TX-module_6805744582343864969_n1600×1600 270 KB

3

Does this hardware use the same esp32 chip that is in the heltec v1 and 2 that we dropped support for? That is going to be an issue.

4

This is based on the ESP32-D0WDQ6 (8mb flash) - not recommended for new designs anymore

RAK11200 has a ESP32-D0WDQ6 under the metal lid

ESP32-WROVER contains the same ESP32-D0WDQ6

Page 12

ExpressELRS hardware is based on either STM32/ESP32/ESP8285, they dont have any ESP32 S3 devices yet

5

The 11200 is not working well either so that may be the problem there, that would be too bad.

6

The Heltec boards specifically have design issues stared for v1 and v2 on Meshtastic docs

7

What currently is the known issues ?

8

They run really really hot, can’t generate a UInt32 that does not overflow and reboot randomly are the ones I know of. They are really unpredictable compared to all the other ESP32 boards.

9

I know recently of wifi issues also.

I guess these issues will require more debugging

10

A lot of the wifi issues seem to be general esp32 issues for chips that don’t have N support

11

Cool! Looks like a very powerful and affordable device, bar the ESP32-issues.
Would the support be limited to the 2.4Ghz version? I noticed there are 915 & 868 Mhz versions at 500mW as well.

12

Not at all, requires changes to support the other ELRS devices

I just do not have the 868/915 version myself

Here is an outstanding PR for the Happymodel ES900TX board

1 Like