Hi,

I recently purchased an M5stack tough unit to experiment with MODBUS RTU and some I2C sensors but currently facing issues with getting the EXT module to work...

My problems:

• ESP-IDF - Querying an SDM630 utility meter (modbus RTU), i keep getting timeout, despite assigning GPIO27 as RX and GPIO19 as TX in the menuconfig in esp-idf. I have A and B connected on both ends. (I have also configured baud, bits, parity etc.. on both ends).
• Tough Tools firmware, I2C devices are not showing under External I2C0 (Wire) G33 and G32. How come? I tried with an ATECC608B.

Am i missing something? Feels like these should just work..
Any ideas?

Thanks in advance!