Hi, I bought another RevPi Connect+ device but I have again the same modbus communication problem with Modbus RS485 on /dev/ttyRS485 - if i use '/dev/ttyUSB0' (with usb/rs485 adapter) all work correctly !!! - if i use '/dev/ttyRS485' (with two wire +- connected to modbus rs485 pinout) doesn't work !...

Hi Nicolai,

i had update ro Buster the revPi and seems to be ok, but now i have this problem via SSH " Server does not support diffie-hellman-group1-sha1 for keyexchange"
How i can solve it?:



Thanks

Hi Nicolai,
Yes on my device there is Stretch (no particolar reasons, but only because i had buy this device 24 months ago').
I have to update to Buster

this is other screenshot pi.modbus-master status:

Hi Nicolai, this is the kernel.log: https://i.ibb.co/5WmSHrf/kernel.jpg Slave option is disabled: https://i.ibb.co/wptD71Y/slave.jpg is there any system bug on the RS485 port that needs updating? I need urgent assistance because we are buying 50 pcs (for our monitoring system) but we are worry by th...

Hi Nicolai I'll send you the Kernel Log tomorrow. Other useful information about my problem: if i use ' /dev/ttyUSB0 ' (with usb/rs485 adapter) all work correctly !!! [/u]if i use ' /dev/ttyRS485 ' (with two wire +- connected to modbus rs485 pinout) doesn't work !!! Also the command piTest -r Modbus...

Hi, i have a communication problem with Modbus RTU communication on MyrevPi Connect +. The communications are working well but, a few hours ago, I had this problem when I launch my Python program (influxDB.py) to read the modbus RTU data from my device. Now not found ! I use minimalmodbus driver (ht...

Hi, i have a communication problem with Modbus RTU communication on MyrevPi Connect + with Voltage Meter Lovato DMG210 I always get a reading with zero value on my VL1 reading register at address 0002H (Single Phase L1 Voltage). Can I get help to solve the problem? This the general Diagram https://i...