Search found 8 matches
- 19 Dec 2022, 23:38
- Forum: Software
- Topic: No such file or directory: '/dev/ttyRS485'
- Replies: 13
- Views: 4803
Re: No such file or directory: '/dev/ttyRS485'
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 !...
- 05 Oct 2022, 23:04
- Forum: Software
- Topic: No such file or directory: '/dev/ttyRS485'
- Replies: 13
- Views: 4803
Re: No such file or directory: '/dev/ttyRS485'
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
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
- 05 Oct 2022, 16:26
- Forum: Software
- Topic: No such file or directory: '/dev/ttyRS485'
- Replies: 13
- Views: 4803
Re: No such file or directory: '/dev/ttyRS485'
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
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
- 05 Oct 2022, 14:57
- Forum: Software
- Topic: No such file or directory: '/dev/ttyRS485'
- Replies: 13
- Views: 4803
Re: No such file or directory: '/dev/ttyRS485'
this is other screenshot pi.modbus-master status:
- 05 Oct 2022, 14:29
- Forum: Software
- Topic: No such file or directory: '/dev/ttyRS485'
- Replies: 13
- Views: 4803
Re: No such file or directory: '/dev/ttyRS485'
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...
- 03 Oct 2022, 23:28
- Forum: Software
- Topic: No such file or directory: '/dev/ttyRS485'
- Replies: 13
- Views: 4803
Re: No such file or directory: '/dev/ttyRS485'
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...
- 03 Oct 2022, 11:43
- Forum: Software
- Topic: No such file or directory: '/dev/ttyRS485'
- Replies: 13
- Views: 4803
No such file or directory: '/dev/ttyRS485'
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...
- 29 Aug 2022, 14:30
- Forum: Software
- Topic: Modbus RTU 485 Master
- Replies: 1
- Views: 960
Modbus RTU 485 Master
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...