Hello,
I am wondering what to try and troubshoot to get my setup to work again.
My project has two arduinos communicating with each other using rs485's and the SoftwareSerial library to use pins other than the default rx and tx pins, 0 and 1. They share a power source of 5V coming from a stepdown dc-to-dc converter with an original supply of 12V (12V is needed in other unrelated areas of the project). I have NPN resistors wired to provide GND to the enable pins.
I have had this configuration wired and working perfectly, but when i tried to copy the circuit to have more organized wire management the receiver is no longer getting any signal.
I have tried:
- Bypassing the transistors to provide GND and PWR directly incase i wired them incorrectly.
- Using a multimeter to test if there is the expected voltage differences with respect to GND at each pin on the rs485's and arduino connections.
- Switching rx and tx pins incase i wired them incorrectly.
Any advice on what else would be a good idea to try?