Sonoff TH10/16 WiFi Relays Support Temperature and Humidity Probes

Sonoff are dirt cheap WiFi AC/DC relay systems based on ESP8266 selling for about $5 with board and case. They are made by ITEAD Studio, and the company has now new versions supporting up to 16A @ 250V, and with a 2.5mm connector to connect external temperature and humidity probes.

sonoff-th10-temperature-humidity-probeTwo models are available Sonoff-TH10 (10A max) and Sonoff-TH16 (16A max) with the following specifications:

  • SoC – Espressif ESP8266 Tensila L106 32-bit MCU up to 80/160 MHz with WiFi
  • Connectivity – 802.11 b/g/n WiFi with WPA/WPA2 support
  • Relay
    • Sonoff-TH10 – HK3FF-DC5V-SHG supporting 90 to 250 VAC input, up to 10A (2200 Watts)
    • Sonoff-TH16 – Hongfa HF152F-T supporting 90 to 250 VAC input, up to 16A (3500 Watts)
  • Terminals – 6 terminal for mains and load’s ground, live and neutral signals.
  • Misc – 4-pin 2.5mm jack for external probes, LEDs for power and WiFi status
  • Dimensions – PCB: 89.1 x 45.0 x 1.2mm
  • Temperature range – -40 ℃ to 125 ℃

The company also offer two probes to connect the sensor jack: one based on AM2301 sensor for temperature (-40 to +80 °C, +/- 0.5 °C) and humidity (10 to 90%, +/- 3%), and an a waterproof temperature probe based on DS18B20 supporting  -55 to 125 °C range.

sonoff-th16-connection-diagramThe wireless relays can be controlled with eWeLink app for Android or iOS, where you can manually turn on and off the load, but also set temperature and/or humidity threshold to start and stop a device. Some technical details, most related to the hardware like PDF schematics, can be found on the Wiki.

ITEAD Studio now have a nice portfolio of inexpensive device for “smart home”. Please note that (AFAIK) none of the items have UL or TUV safety certifications, so use them at your own risks.

itead-smart-home-productSonoff-TH10/TH16 and sensor probes can be purchased on ITEAD Studio’s Sonoff-TH page with Sonoff-TH10 selling for $7.50, Sonoff-TH16 for $8.60, Sonoff Sensor-AM2301 temperature & humidity sensor for $4.30, and Sonoff Sensor-DS18B20 waterproof temperature probe for $3.50. Shipping is not included but only adds a couple of dollars, if you select the cheapest (and slowest) options.

Thank to Harley for the tip.

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By the way, I would not use these with 16 Amp or even 10 Amp with those tention only connections. But for up to 5 Amp they should be safe enough. Tough personally I would like to use these for sensors only.

Would love to use Easy Esp firmware on them


Also checkout ESPurna firmware as done by Xose “Tinkerman” Pérez for Sonoff



That article is truly hilarious 😀