Hello, I am working on a project with LoRa for monitoring sensor parameters (RS485 equivalent to UART port on Arduino). I used esp32 from Heltec, Lyligo TTGO and etc, but it is not working as expected. I need 3 devices from Arduino with implemented GPS and LoRa chip, and 1 device with SIM module and LoRa. I will be grateful if someone tells me, what I should buy. Thank you in advance.
what was the problem?
I've used esp32 from Heltec, Lyligo TTGO and they did the job for me
I just solved the problem. I used a Level shifter from 3.3V to 5V to convert the signal voltage, but an hour ago I found that the RS485 module has an integrated level shifter, so the external level shifter it's not needed.
Just to ask you something. What did you do with TTGO? What kind of projects? Did you use an external GPS module or TTGO with an integrated GPS chip?
It was with various sensors, no GPS. If you want low power you need to be able to turn off external modules. That’s not always possible when everything is integrated on the same board ➜ so I would opt for separate elements for such a project