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by krava123
Tue Mar 06, 2018 9:19 am
Forum: Wireless / Wired
Topic: MAX485 RS485 transceiver module (HCMODU0081)
Replies: 2
Views: 12160

Re: MAX485 RS485 transceiver module (HCMODU0081)

Hello, i'm having problem with this module. It does transmit, but does not receive. Have measured signal with osciloscope and found, that RX falls from 5 VDC to 3,5 VDC. Microprocessor can not read 3,5 VDC as 0. Have removed all resistors ( except R7 and R8 ), doesn't help, result is the same. Any i...