modbus RTU MASTER and rs485 with lora32

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daga95
Posts: 1
Joined: Fri Apr 19, 2019 11:00 pm

modbus RTU MASTER and rs485 with lora32

Post by daga95 » Fri Apr 19, 2019 11:24 pm

Hello, i am from Colombia, i am working with TTGO Lora32 V2.1, i'll leave the link below, i need to use the board like MASTER MODBUS RTU with port rs485 to communicate with a slave sensor, I know the umodbus library but I do not know how to make the port rs485, I have a module ttl to rs485, I will also leave the link below, someone knows how to connect this module and program it and be able to make the modbus communication through this, please I need help

Lora32: https://es.aliexpress.com/item/TTGO-LoR ... 7a106549-2

TTL to RS485 module:https://es.aliexpress.com/store/product ... st=ae803_4

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