Product description
This is a Bauhn (Aldi) AP5W-0624 It is a 5-outlet powerboard with separate “always on” 2xUSB-A and 2xUSB-C outlets. Purchased in July 2024.
The powerboard incorporates a Tuya CBU module incorporating the BK7231N processor.
To realign for ESPHome use I went straight for the “solder and reprogram” method rather than exploring other software only reprogramming options.
The unit is easy to open with “Triangle” socket screws on the back. The CBU module is fairly accessible to solder on the 5 required wires.
The powerboard also incorporates power monitoring using the BL0942 chip.
Other features of the board are:
- Separate relays for each power outlet
- Surge protection (indicated by an always on green LED)
- Single addressable blue LED
- Single momentary push button
- Re-settable overload (10A)
Pinout
This powerboard incorporates the CBU module
Programming header pinout
| Pin | Comment |
|---|---|
| TX1 | Transmit (connect to Rx on programmer) |
| RX1 | Receive (connect to Tx on programmer) |
| 3.3v | 3.3V |
| Gnd | Ground |
| CEN | Ground to access programming mode |
Internal pinout
| Pin | Function |
|---|---|
| P22 | Push Button |
| P28 | Status LED |
| P6 | Relay #1 |
| P7 | Relay #2 |
| P8 | Relay #3 |
| P9 | Relay #4 |
| P24 | Relay #5 |
| TX1 | Comms to BL0942 |
| RX1 | Comms to BL0942 |
Button
The setup will turn on plugs 1 to 4 with each short press, then once all plugs are on, turn off plugs 1 to 4 with each short press.
A long press will toggle all plugs on or off.
Basic Configuration
# Bauhn 5 way powerboard with individual socket switchng and BL0942 power monitoring.
# USB sockets are permanently on.
# There is only one controllable LED
substitutions:
name: bunk-bedroom-power
friendly_name: Bauhn Power Board
relay_restore_mode: RESTORE_DEFAULT_OFF
esphome:
name: bauhn-5-way-power-board
comment: Bauhn 5 way powerboard with power monitoring
bk72xx:
board: cbu
globals:
- id: set_on
type: "bool"
restore_value: no
initial_value: "1"
# Enable logging
logger:
# Enable Home Assistant API
api:
encryption:
key: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
ota:
- platform: esphome
id: my_ota
password: !secret ota_password
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Bauhn-5-Way-Power-Board"
password: "xxxxxxxxxxxxxxxx"
ap_timeout: 2min
# Not sure but this device did not attach to my SSID without the ap_timeout set to 2 min WiFi a bit weak?
captive_portal:
text_sensor:
- platform: libretiny
version:
name: LibreTiny Version
switch:
- platform: gpio
name: "${friendly_name} 1"
pin: P6
id: relay_1
icon: mdi:power-socket-au
restore_mode: ${relay_restore_mode}
- platform: gpio
name: "${friendly_name} 2"
pin: P7
id: relay_2
icon: mdi:power-socket-au
restore_mode: ${relay_restore_mode}
- platform: gpio
name: "${friendly_name} 3"
pin: P8
id: relay_3
icon: mdi:power-socket-au
restore_mode: ${relay_restore_mode}
- platform: gpio
name: "${friendly_name} 4"
pin: P9
id: relay_4
icon: mdi:power-socket-au
restore_mode: ${relay_restore_mode}
- platform: gpio
name: "${friendly_name} 5"
pin: P24
id: relay_5
icon: mdi:power-socket-au
restore_mode: ${relay_restore_mode}
light:
- platform: status_led
name: "${friendly_name} Status LED"
id: blue_led
# disabled_by_default: true
pin:
inverted: false
number: P28
binary_sensor:
- platform: gpio
pin:
number: P22
mode:
input: true
pullup: true
inverted: true
name: "${friendly_name} Button"
id: button1
on_multi_click:
- timing:
- ON for at most 0.5s
- OFF for at least 0.5s
then:
lambda: |-
if ( id(set_on) ) {
if (! id(relay_1).state ) {
id(relay_1).turn_on();
} else if ( ! id(relay_2).state ) {
id(relay_2).turn_on();
} else if ( ! id(relay_3).state ) {
id(relay_3).turn_on();
} else if ( ! id(relay_4).state ) {
id(relay_4).turn_on();
} else if ( ! id(relay_5).state ) {
id(relay_5).turn_on();
id(set_on) = 0;
} else {
id(relay_1).turn_off();
id(relay_2).turn_off();
id(relay_3).turn_off();
id(relay_4).turn_off();
id(relay_5).turn_off();
}
} else {
if ( id(relay_1).state ) {
id(relay_1).turn_off();
} else if ( id(relay_2).state ) {
id(relay_2).turn_off();
} else if ( id(relay_3).state ) {
id(relay_3).turn_off();
} else if ( id(relay_4).state ) {
id(relay_4).turn_off();
} else if ( id(relay_5).state ) {
id(relay_5).turn_off();
id(set_on) = 1;
} else {
id(relay_1).turn_on();
id(relay_2).turn_on();
id(relay_3).turn_on();
id(relay_4).turn_on();
id(relay_5).turn_off();
}
}
- timing:
- ON for at least 0.5s
- OFF for at least 0.2s
then:
lambda: |-
if (id(relay_1).state ||
id(relay_2).state ||
id(relay_3).state ||
id(relay_4).state ) {
id(relay_1).turn_off();
id(relay_2).turn_off();
id(relay_3).turn_off();
id(relay_4).turn_off();
id(relay_5).turn_off();
} else {
id(relay_1).turn_on();
id(relay_2).turn_on();
id(relay_3).turn_on();
id(relay_4).turn_on();
id(relay_5).turn_on();
}
uart:
id: uart_bus
tx_pin: TX1
rx_pin: RX1
baud_rate: 4800
stop_bits: 1
sensor:
- platform: bl0942
uart_id: uart_bus
voltage:
name: '${friendly_name} Voltage'
current:
name: '${friendly_name} Current'
power:
name: '${friendly_name} Power'
filters:
multiply: -1
energy:
name: '${friendly_name} Energy'
frequency:
name: "${friendly_name} Frequency"
accuracy_decimals: 2
update_interval: 10s
