Webhook Output

ESPGeiger can send radiation data to a custom URL endpoint via HTTP POST. This allows you to integrate your Geiger counter readings with your own services, databases or automation systems.

Setup

1. Configure ESPGeiger: In the ESPGeiger web interface, click Config and enter your target URL in the Webhook section. Optionally set a Key for authenticating requests from your device.
2. Set the interval: Configure the submission interval in seconds. The default is 60 seconds.

ESPGeiger will report the Webhook submission status in the Web Interface console.

Note: Only HTTP endpoints are supported. HTTPS URLs will be downgraded to HTTP.

JSON Payload

ESPGeiger submits a JSON payload via HTTP POST with Content-Type: application/json. The following fields are included:

Field	Type	Description
id	string	Device chip ID
key	string	Configured webhook key (only included if set)
ut	integer	Uptime in seconds
cps	float	Current counts per second
cpm	float	Current CPM (1-minute smoothed)
cpm5	float	5-minute smoothed CPM
cpm15	float	15-minute smoothed CPM
usv	float	Current microsieverts per hour (μSv/h)
hv	float	High voltage reading in volts (ESPGeiger-HW only)
tc	integer	Total accumulated click count since boot
mem	integer	Free heap memory in bytes
rssi	integer	WiFi signal strength in dBm

Example JSON Output

{"id":"7a9256","ut":3600,"cps":0.50,"cpm":30.00,"cpm5":29.50,"cpm15":30.10,"usv":0.20,"tc":1800,"mem":19088,"rssi":-45}