Site Connectivity
Communication chain: Cloud → VPN → Modem → Gateway → Meter → MCBs
Communication Chain — Bloemfontein Central
Cloud
online
MQTT Broker
WireGuard
VPN
established
10.100.8.1
-73 dBm
Modem
degraded
196.25.107.17
LAN
Gateway
online
10.100.8.10
RS485
Meter
polling
/dev/ttyUSB0
Addr 10
Slot 1
online
Vodacom
Addr 11
Slot 2
online
MTN
Addr 12
Slot 3
online
Cell C
Addr 13
Slot 4
online
Telkom
Model
Cradlepoint IBR900
IMEI
359007777777777
SIM ICCID
8927100077777777777
SIM Provider
MTN IoT
APN
internet.mtn.co.za
Public IP
196.25.107.17
VPN IP
10.100.8.1
Signal
-73 dBm
Technology
4G LTE
Band
B7 (2600 MHz)
Uptime
14d 0h
Last Handshake
2s ago
Firmware
RUTX_R_00.07.06.1
Smart MCBs — Modbus RTU Devices4 cassettes
| Slot | Tenant | Model | Modbus Addr | Virtual Port | Baud | Status | Last Cmd | Response | Latency | FW |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Vodacom | Acrel ASCB1-63-C63/3P+N | 0x0A | /dev/ttyUSB1 | 9600 | online | READ_STATUS | OK | 27ms | ASCB1-v1.3.2 |
| 2 | MTN | Acrel ASCB1-63-C63/3P+N | 0x0B | /dev/ttyUSB2 | 9600 | online | READ_STATUS | OK | 18ms | ASCB1-v1.3.2 |
| 3 | Cell C | Acrel ASCB1-63-C63/3P+N | 0x0C | /dev/ttyUSB3 | 9600 | online | READ_STATUS | OK | 18ms | ASCB1-v1.3.2 |
| 4 | Telkom | Acrel ASCB1-63-C63/3P+N | 0x0D | /dev/ttyUSB4 | 9600 | online | READ_STATUS | OK | 16ms | ASCB1-v1.3.2 |
Quick Connection Reference
# SSH to Edge Gateway via VPN
ssh [email protected] -p 22
# Read Meter via Modbus TCP (virtual port)
modpoll -m tcp -a 1 -r 1 -c 42 -t 3 10.100.8.10:502
# Subscribe to MQTT telemetry
mosquitto_sub -h mqtt://localhost:1883 -p 1883 -t "powergrid/sites/BFN-001/telemetry" --cafile ca.pem
# Trip MCB Slot 1 (Modbus write coil)
modpoll -m tcp -a 10 -r 1 -t 0 -c 1 10.100.8.10:502 0