Autoconnecto
Compatible hardware
ESP32 and STM32 over MQTT; Raspberry Pi 5/4/Zero 2 W, Orange Pi, Radxa ROCK, and BeagleBone with the Python SDK (MQTT, HTTPS, GPIO); PUSR DR154; XY-MD02; Multispan AVH-14-M1. Other Modbus meters use that model’s register map.
Controllers
Native MQTT (or HTTPS on Linux). Device clients — not a local platform edge.
Board tested · Arduino SDK
ESP32
Telemetry, shared attributes, RPC, and OTA over MQTT. Flash the SDK, set the device token in secrets.h.
Arduino core · same MQTT contract
STM32
Use an STM32 Arduino core with enough RAM for TLS. Same topics as ESP32 — not a separate binary SDK.
Installable Python · MQTT + HTTPS + GPIO
Raspberry Pi / Linux SBC
Package autoconnecto. Full install includes gpiozero: digital out/in and Switch relay channels. Named boards: Raspberry Pi 5, 4, 3, Zero 2 W; Orange Pi 5; Radxa ROCK 5; BeagleBone; industrial Debian gateways.
Cellular Modbus DTUs
Cloud Autoconnecto is the Modbus master. Use MQTT work mode — not Transparent TCP.
Bench tested
PUSR / USR-DR154
4G MQTT ↔ RS-485 serial bridge. Other MQTT-serial Modbus DTUs fit the same role when you can map their tunnel topics.
Climate stack
Bench tested · ClimateFleet
XY-MD02 + PUSR DR154
RS-485 Modbus temperature and humidity probe through the same cellular DTU path as energy meters.
Proven energy Modbus stack
Use MQTT work mode on the DTU with the gateway topics from Check connectivity.
Bench tested · EnergyFleet
Multispan AVH-14-M1 + PUSR DR154
- Meter
- Multispan AVH-14-M1 · RS-485 Modbus RTU · float CDAB
- Gateway
- PUSR / USR-DR154 · 4G · MQTT serial to RS-485
Multispan Modbus meters
Confirm RS-485 Modbus is on the order code. Some Multispan variants list Modbus as optional.
- AVH-14-M1Bench tested
Bench tested. Float CDAB map published.
- AVH-14N-M1Map from PDF
Modbus RTU. Different register layout from M1 — use that PDF.
- AVH-16 / AVH-16-M1Map from PDF
Modbus RTU · THD · import/export. Map from that PDF.
- AVH-16+-M1Map from PDF
Modbus RTU · THD · import/export. Map from that PDF.
Other Modbus RTU energy meters
Same DR154 or ESP32 / Linux Modbus-edge path. Enter slave ID, baud, and registers from that model’s Modbus manual.
- SelecMFM384, MFM384-R-C
- Secure MetersElite 500 and Elite with RS-485
- ElmeasureLG / multifunction series with RS-485
- Schneider ElectriciEM3255 and similar iEM Modbus meters
- SiemensSENTRON PAC3200 / PAC with Modbus
- ABBB24 and similar Modbus energy meters
- EastronSDM630, SDM72D-M and SDM Modbus family
- Carlo GavazziEM340, EM540
- JanitzaUMG 96 and Modbus UMG meters
- L&T and other panel MFMsAny RS-485 Modbus RTU multifunction meter
List your meter
Send the Modbus PDF to founder@autoconnecto.in. We publish a named guide when the map is proven.