Search found 2 matches

by TLSESP32
Thu Jan 11, 2018 9:53 am
Forum: ESP32 Arduino
Topic: ESP32 RS485driver hardwareserial ModbusMaster
Replies: 20
Views: 10651

Re: ESP32 RS485driver hardwareserial ModbusMaster

From time to time I get a response from the slave device. Still don't know what the cause could be, the pulse train looks very clean so I don't expect a hardware/noise issue.

There is also no softwareserial library for the ESP32?
by TLSESP32
Wed Jan 10, 2018 12:31 pm
Forum: ESP32 Arduino
Topic: ESP32 RS485driver hardwareserial ModbusMaster
Replies: 20
Views: 10651

ESP32 RS485driver hardwareserial ModbusMaster

Hi, I'm trying to establish RS485 Modbus communication between ESP32 - RS485 Arduino driver board - Modbus device by using harwareserial(2) and the MODBUSMASTER library. https://github.com/4-20ma/ModbusMaster I know the MAXRS485 is TTL and ESP is CMOS, but I tried the code on an Arduino MEGA, and po...

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