As I found out quite a lot since I originally posted my question, here is the latest summary:
- I'm trying to connect a BMV-712 smart (rev2) to VRM using a LoRaWAN module
- LoRa communication works perfectly, but BMV-712 smart (rev2) never shows up in VRM
- Communication through LoRa using a BlueSolar MPPT works instantly
- I read VE.direct protocol specification and analyzed the situation quite a lot:
- Output of BMV-712 smart (rev2) on VE.direct
PID 0xA383 V 25564 VS 25426 I -3092 P -79 CE -6334 SOC 993 TTG 8980 Alarm OFF Relay OFF AR 0 BMV 712 Smart FW 0413 MON 0 Checksum � H1 -29323 H2 -6334 H3 0 H4 0 H5 0 H6 -419554 H7 27 H8 29780 H9 10860 H10 0 H11 0 H12 0 H15 23 H16 25749 H17 1091 H18 1356 Checksum Z
- Using an Arduino I simulated a BMV-702 (which did work instantly in VRM) with this payload:
V 12800 VS 24500 VM 1280 DM 120 VPV 3350 PPV 196 I 15000 IL 1500 LOAD ON T 25 P 192 CE 13500 SOC 876 TTG 45 Alarm OFF Relay OFF AR 1 H1 55000 H2 15000 H3 13000 H4 230 H5 12 H6 234000 H7 11000 H8 14800 H9 7200 H10 45 H11 5 H12 0 H13 0 H14 0 H15 11500 H16 14800 H17 34 H18 45 H19 456 H20 45 H21 300 H22 45 H23 350 ERR 0 CS 5 BMV 702 FW 1.19 PID 0x204 SER# HQ14415IZFW HSDS 0 Checksum ⸮
- As this proves that basic BMV communication is working through my LoRaWAN module I suspected that there is a problem with the payload from my BMV-712 smart (rev2). This hardware has PID 0xA383. I tried a payload that simulates being from a BMV-712 smart (rev1) with PID 0xA381 without changing anything else (except checksum of course). My Payload was:
PID 0xA381 V 25564 VS 25426 I -3092 P -79 CE -6334 SOC 993 TTG 8980 Alarm OFF Relay OFF AR 0 BMV 712 Smart FW 0413 MON 0 Checksum ⸮ H1 -29323 H2 -6334 H3 0 H4 0 H5 0 H6 -419554 H7 27 H8 29780 H9 10860 H10 0 H11 0 H12 0 H15 23 H16 25749 H17 1091 H18 1356 Checksum Z
This was a success. It showed up in VRM instantly.
- Output of BMV-712 smart (rev2) on VE.direct
- This leads me to the conclusion that my LoRaWAN module with firmware 1.06 does not correctly recognize my BMV-712 smart (rev2) and as such does not send it's data to VRM. I think it is unexpected behavior / a bug in the LoRaWAN module.
For Victron Staff:
My VRM Installation ID is 319124 if you want to look up something in the logs.
=== Original Post ===
I'm trying to connect a BMV-712 smart through a LoRaWAN module with no success. LoRA communication is fine. Signal is good, the gateway receives the messages and communication shows up in VRM, but only the LoRaWAN is shown in device list. The BMV never shows up. After trying many power cycles, checking all cabling etc. I connected the LoRaWAN to my BlueSolar MPPT just to see if anything works at all. After power cycling the LoRaWAN the MPPT showed up in VRM instantly. I switched back to the BMV, power cycled both the LoRAWAN and the BMV... no success :-(
When disconnecting the LoRaWAN VE.direct it starts blinking yellow. After reconnecting it to the BMV it blinks green again so it recognizes something...
I'm out of ideas. Hope somebody can help.
VRM Installation ID is 319124.
EDIT 1:
The LoRa gateway is not a single channel one. It's run by a friend of mine and it is just 250m away. We also checked it on TTN and the gateway is fine.
EDIT 2:
This is the output on BMV VE.direct port:
PID 0xA383 V 25564 VS 25426 I -3092 P -79 CE -6334 SOC 993 TTG 8980 Alarm OFF Relay OFF AR 0 BMV 712 Smart FW 0413 MON 0 Checksum � H1 -29323 H2 -6334 H3 0 H4 0 H5 0 H6 -419554 H7 27 H8 29780 H9 10860 H10 0 H11 0 H12 0 H15 23 H16 25749 H17 1091 H18 1356 Checksum Z
And for my MPPT
PID 0xA060 FW 161 SER# HQ2xxxxxxxx V 25570 I 0 VPV 140 PPV 0 CS 0 MPPT 0 OR 0x00000001 ERR 0 LOAD OFF IL0 H19 9263 H20 70 H21 216 H22 162 H23 333 HSDS 71 Checksum �
I'm no expert on VE.direct communication but at first glance it looks okay to me. One difference: BMV does not provide it's serial number. Is this normal?
