Set up an ESP32 IoT gateway: flash it, join Wi-Fi, come online

Updated

A gateway bridges your field devices (RS485/Modbus sensors, GPIO, etc.) to Synacl over MQTT.

  1. Open Gateways → Add gateway and follow the self-service flasher to load firmware onto your ESP32. See flash an ESP32.
  2. Provision it with your Wi-Fi credentials — the gateway registers itself and appears in your list. See provision Wi-Fi.
  3. Add devices under the gateway; their telemetry starts flowing to your dashboards.

A gateway shows online within ~90 seconds of its first message. If it stays offline, see device shows offline.

Not using an ESP32? A Raspberry Pi, a PC, a PLC or a container can be a gateway too: register it as a software gateway and speak the public gateway protocol. See connect your own gateway.

More in Getting started
What is Synacl?
A quick tour of the platform — devices, gateways, dashboards, rules, and alerts.
Quickstart: from signup to a live IoT dashboard in five steps
Create an account, connect an ESP32 gateway or an MQTT device, see live data on a dashboard and get your first threshol…
IoT platform glossary: devices, gateways, tags, telemetry, events and alerts
The vocabulary Synacl uses: device, gateway, tag (parameter), telemetry, event, alert, tenant and plan, and how the pie…
Setting up your account securely
Verify email, add a passkey or 2FA, and set your profile.
Add a Modbus, MQTT, GPIO or webhook device to your IoT dashboard
Register a device and pick the right protocol for how it connects: mqtt-direct, RS485/Modbus, GPIO, I²C, SPI, 1-Wire, U…
Try Synacl without hardware: add a simulated device
No ESP32 or sensor yet? Add a simulated sensor that publishes live temperature, humidity and light readings for an hour…