Projects/Oceanwave Lamp Esphome
| Project: Oceanwave Lamp Esphome | |
|---|---|
 | |
| Beschrijving | Now with PWM |
| Start | 2026-01-18 |
| Contact | Polyfloyd |
| Status | Finished |
I found an "Ocean Wave" lamp in a drawer this weekend. It's something I got from AliExpress at one point because I thought it would be neat for themed lighting in my living room. But I never got around to actually using it. It's not that it's bad (ok, maybe a bit), but it is just a hassle to use it.
So could it be made easier?
Sure thing, I could just open it up and slap an ESP32 on it. That way I can hook it into my Home Assistant setup and have it automatically switch on whenever I select a specific lighting scene.
The Device
The lamp consists of two parts bolted together with a mechanism that makes it possible to adjust the projection angle. The base contains the electronics and buttons, the top part has a transparent top with some jiggly texture that acts as a lens. Within the top is another smaller jiggly lens with a panel with 12 LEDs, 4 for each color channel, underneath.
The smaller interior lens is moved by a small motor which causes the light to be scattered in a random moving pattern.
The buttons are a kind of capacitive sensors and absolutely terrible to use. It usually takes about 4 presses to actually trigger a button.
Some genius thought that people purchasing this would be down to listen to ambient noises through the shittiest speakers known to humankind, so it also has that built into it. It has an SD-card slot for if you truly despise your eardrums.
Teardown
The lamp can be easily opened up by removing two screws under some rubber pads at the bottom.
This reveals two circuit boards. One with the capacitive touch interface and the other with an MCU and some FETs and other crap.
The R, G and B LEDs all have their own wire running to the board which is neatly labeled. Not too far from the board contacts are a bunch of FETs to drive them. The same goes for the motor, which has 2 wires. Through some volt- and continuity measuring I figured out where these circuits could be powered.
Hacking
I got rid of the button board to make some more room. Likewise, I was not interested in the speakers, so I cut those wires.
I wanted to keep the FETs to drive the LEDs and motor so I kept the MCU circuit board. I did some poking into what I presumed to be the collector contacts of the FETs by shorting them to a 3.3V contact. The LEDs powered on, so I knew that I could just attach those to the GPIOs of the ESP.
I then added the ESP and did some testing. When all was well, I added comical amounts of hot glue and closed it back up.
Esphome
esphome:
name: oceanwave
friendly_name: Oceanwave
esp32:
board: esp32thing
framework:
type: esp-idf
logger:
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
reboot_timeout: 3min
ota:
platform: esphome
password: !secret ota_password
mqtt:
broker: mqtt.local
discovery: false
api:
sensor:
- platform: wifi_signal
name: "WiFi Signal dB"
update_interval: 10s
state_topic: esphome/oceanwave/wifi_signal
retain: false
light:
- platform: rgb
id: rgb_light
name: "Light"
red: red
green: green
blue: blue
on_turn_on:
- switch.turn_on: motion
on_turn_off:
- switch.turn_off: motion
switch:
- platform: output
id: motion
name: "Motion"
output: motor
output:
- platform: ledc
id: red
pin: 22
- platform: ledc
id: green
pin: 17
- platform: ledc
id: blue
pin: 21
- platform: gpio
id: motor
pin: 26
