Tongou · 2 products

Tongou is a brand of DIN rail mounted devices for smart electrical installations. The offer includes relays with energy metering and protection, energy meters with a current transformer, and temperature and humidity controllers. The devices connect via WiFi or Zigbee and work with the Tuya Smart Life app, and the Zigbee versions also work with Home Assistant and Zigbee2MQTT.

Tongou: smart electrical installation on a DIN rail

Tongou is a brand of devices for electrical distribution boards that add energy measurement, remote control and protection to an installation. The manufacturer is Changyou Technology, so on some enclosures you will see the Chayo logo, which according to the manufacturer belongs to the same company and does not change the parameters or after-sales support. All devices are mounted on a standard 35 mm DIN rail, next to circuit breakers.

Relays, energy meters and controllers

• Relays with energy measurement measure voltage, current, power and consumption, and also protect the circuit: they react to overcurrent, voltage that is too high or too low, excessive power and high temperature
• Energy meters with a current transformer measure the consumption of a selected circuit without interrupting it, so they are suitable for monitoring consumption, for example of a heat pump or a car charger
• Temperature and humidity controllers with a probe control a fan, a heater or a dehumidifier according to the set thresholds

WiFi or Zigbee

WiFi versions connect to your home 2.4 GHz network and can be operated in the Tuya Smart or Smart Life app without additional devices. Zigbee versions require a Zigbee gateway or coordinator, but they work well in local smart home systems: the manufacturer states support for them in Home Assistant and Zigbee2MQTT. You can then use the measurements and the relay state in your own automations, for example to disconnect loads at high power consumption.

Safety and installation

Tongou devices are installed in a distribution board, so the installation should be carried out by a qualified electrician. Before buying, check on the product page the maximum circuit current, the way the wires are connected and whether the device has a relay. A meter without a relay only measures and sends alarms, and a relay is needed to disconnect a circuit.

Frequently asked questions about Tongou

Does Tongou work with Home Assistant?
Yes, the manufacturer describes the Zigbee versions as compatible with Home Assistant and Zigbee2MQTT. A Zigbee coordinator is required to use them.

Which app controls Tongou devices?
You can control WiFi and Zigbee versions with a Tuya gateway in the Tuya Smart or Smart Life app, where you set protection thresholds, schedules and alarms.

Are Chayo and Tongou the same brand?
Yes. According to the manufacturer, both marks belong to Changyou Technology, and the different logo on the enclosure does not affect the device parameters.