Etekcity Voltson ESW01-EU
To reach the ESP pins, you need to open the device by unscrewing two (really) small Torx on the front and get the board out with four Philipps screws. Then, all necessary pads for flashing are accessible. Attach 5V and GND at the bottom, preferably with test hooks. For flashing, T12 is TX and T13 is RX. During boot, T11 and T16 pads need to be connected to GND. Easiest is to connect these pads with pogo pins.
|GPIO12||HLWBL CF1 Pin|
|GPIO13||HLW8012 CF Pin|
The HLW8012 SEL pin is permanently pulled high, so you can only read power and voltage. With a small calculation trick you can get current values though (see
esphome: platform: ESP8266 arduino_version: 2.5.1 board: esp01_1m wifi: ssid: !secret wifi_ssid password: !secret wifi_password status_led: pin: number: GPIO5 output: - platform: gpio id: led1 pin: GPIO16 switch: - platform: gpio name: "Relay" id: switch1 pin: GPIO4 restore_mode: RESTORE_DEFAULT_ON on_turn_on: - output.turn_on: led1 on_turn_off: - output.turn_off: led1 binary_sensor: - platform: gpio id: button1 pin: number: GPIO14 mode: INPUT_PULLUP inverted: true on_press: - switch.toggle: switch1 sensor: - platform: hlw8012 sel_pin: 0 # not connected cf_pin: GPIO13 cf1_pin: GPIO12 voltage: id: voltage name: Voltage power: id: wattage name: Wattage on_value: - sensor.template.publish: id: hlw8012_current_calculated state: !lambda 'return id(hlw8012_power).state / id(hlw8012_voltage).state;' update_interval: 10s initial_mode: VOLTAGE change_mode_every: 4294967295 # basically never - platform: template #disabled id: current_calculated name: "Current (calculated)"