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Elegrp RRR00 Smart In-Wall Outlet with Energy Monitoring
Elegrp RRR00 Smart In-Wall Outlet with Energy Monitoring
Device Type: plugElectrical Standard: usBoard: bk72xxDifficulty: Soldering required, 4/5
Elegrp RRR00 Smart In-Wall Outlet with Energy Monitoring
The front has a button for each individually-switched outlet.
The relays are individual, 16A relays. Nice!
Inside is a CBU module, which has a Beken BK7231N: https://fccid.io/2ANDL-CBU/User-Manual/CBU-User-Manual-updated-5064101.pdf
Pinout
The PCB on my outlet had some wrong labels for pins. This confused me until I ohmed straight from the base PCB to the CBU module. Below are the correct labels, in case it helps you.
CBU module Pin | Function | Use on outlet | Label on ELEGRP PCB (mostly incorrect) |
---|---|---|---|
3 | P20, SCL1, TCK | RED LED (LED3) active high | CEN (incorrect) |
8 | P8, PWM2 | Lower switch button active low (SW2) | ADC (incorrect) |
10 | P6, PWM0 | Upper switch button active low (SW1) | P8 (incorrect) |
1 | P14, SCK | Upper white LED (LED1) active high | P7 (incorrect) |
19 | P9, PWM3 | Active high upper outlet enable (R15, Q1) | P6 (incorrect) |
17 | P28 | Lower white LED (LED2) active high | P26 (incorrect) |
9 | P7, PWM1 | Active high lower outlet enable (R16, Q2) | P24 (incorrect) |
15 | P11, TX1 | Programming and TX to BL0942 energy monitor | TX1 |
16 | P10, TX1 | Programming and RX from BL0942 energy monitor | RX1 |
13 | GND | Module GND. Connect to programmer ground when programming | GND |
14 | 3V3 | 3.3V supply to CBU module. Power when programming | 3.3V |
See this pinout for more detail on the CBU side: https://docs.libretiny.eu/boards/cbu/cbu.svg
Disassembly and Initial Flash Procedure
Run the Line and WHITE scresws all the way in. Remove the 4 T7 Torx screws on the back, and remove cover. Cover comes out with module. Remove module from cover. Solder a Sparkfun FTDI Basic's wires to 3.3V, GND, TX, and RX pins. Run esphome with the yaml below, select the COM port. When ESPHome prompts to reset by driving CEN low, use a male-male dupont wire or similar to connect CEN to GND. CEN is the fourth down on the right of the module, GND is second from right on bottom row:
Watch ESPHome for some sign of a flash starting, then release CEN. (as of Nov 2024) Once flashed and on your network, remove soldered wires and re-assemble!
YAML Configuration
Here is my config, with the correct pins and a fallback WiFi for OTA in case I change the name of my wifi. To use, you must create a secrets.yaml file next to this file when compiling, and put your secrets in there. See this link: https://esphome.io/guides/faq.html#how-do-i-use-my-home-assistant-secrets-yaml
# YAML config startsubstitutions: device_name: "RRR00" friendly_name: "Smart In-Wall Outlet with Energy Monitoring"
esphome: name: "${device_name}" friendly_name: "${friendly_name}"
bk72xx: board: cbu
wifi: networks: - ssid: !secret wifi1_ssid password: !secret wifi1_pw - ssid: !secret fallbackSSID password: !secret fallbackPW # Enable fallback hotspot (captive portal) in case wifi connection fails ap: ssid: "${device_name} Fallback" password: !secret fallback_ap_pw# Captive portal to be able to set the WiFi PW back (requires wifi and AP)captive_portal:
# Enable logginglogger: # Set baud to 0 to disable UART logging https://esphome.io/components/logger baud_rate: 0 # (UART logging may interfere with BL0942)
# Enable Home Assistant APIapi: password: ""# Use OTA in future so we don't have to re-solder to re-flashota: platform: esphome password: ""
# Device Specific Config
status_led: pin: number: P20 # Red LED Incorrectly labeled CEN on PCB inverted: no # no invert to be normally off, only on when blinking
# Belling BL0942 on RX1 and TX1 https://esphome.io/components/sensor/bl0942.htmluart: rx_pin: RX1 tx_pin: TX1 baud_rate: 4800 stop_bits: 1
sensor: - platform: wifi_signal name: "${device_name} Outlet WiFi Signal" update_interval: 60s - platform: bl0942 voltage: name: '${device_name} Outlet Voltage' accuracy_decimals: 3 filters: - sliding_window_moving_average: window_size: 64 send_every: 64 send_first_at: 64 frequency: name: "${device_name} Outlet Frequency" accuracy_decimals: 3 filters: - sliding_window_moving_average: window_size: 64 send_every: 64 send_first_at: 64 current: name: '${device_name} Outlet Total Current' accuracy_decimals: 3 filters: - sliding_window_moving_average: window_size: 64 send_every: 64 send_first_at: 64 power: name: '${device_name} Outlet Total Power' accuracy_decimals: 3 energy: name: '${device_name} Outlet Total Energy' accuracy_decimals: 3
binary_sensor: - platform: status # Status for helping see if it is online name: "${device_name} Outlet Status"
- platform: gpio name: "Upper Outlet button" # Upper switch button SW1 shorts P6 low when pressed. pin: number: P6 # Incorrectly labeled P8 on PCB mode: INPUT_PULLUP inverted: True on_press: - switch.toggle: upperRelay
- platform: gpio name: "Lower Outlet button" # Lower switch button SW2 shorts P8 low when pressed. pin: number: P8 # Incorrectly labeled ADC on PCB mode: INPUT_PULLUP inverted: True on_press: - switch.toggle: lowerRelay
switch: - platform: gpio # Upper outlet active-high to energize on P9 name: "Upper Outlet" pin: P9 # Incorrectly labeled P6 on PCB id: upperRelay # restore_mode: ALWAYS_ON on_turn_on: - switch.turn_on: upperLED on_turn_off: - switch.turn_off: upperLED
- platform: gpio # Lower outlet active-high to energize on P7 name: "Lower Outlet" pin: P7 # Incorrectly labeled P24 on PCB id: lowerRelay # restore_mode: ALWAYS_ON on_turn_on: - switch.turn_on: lowerLED on_turn_off: - switch.turn_off: lowerLED
- platform: gpio # Upper LED active-high on P14 name: "Upper LED" pin: P14 # Incorrectly labeled P7 on PCB id: upperLED - platform: gpio # Lower LED active-high on P28 name: "Lower LED" pin: P28 # Incorrectly labeled P26 on PCB id: lowerLED# YAML config end