Home AutomationCoasters

The Eye of the Home

Ivan Lesar

Ivan Lesar

· 3 min read

We’ve got a small-but-worthy project on our hands.

We’re going to build a home camera for less than 10$ and integrate it with HomeAssistant.

The Parts

The first part we need is the brain. The ESP32-CAM board can be bought separately and interfaced with through the pins. But its evolution, the ESP-CAM-MB, includes an additional board which provides us with a micro-USB interface. The linked version provides you with a VGA resolution, but you can order other lenses.

Homeasisstant Lovelace Card

We also need 2 IKEA Coasters, which I’ve also used in the lamp project. Any old Micro-USB cable will do as a connection to the power source.


Carve a small hole, a bit larger than the camera lens. Also, carve a hole for the Micro-USB cable. Plug the cable into the board, stick everything together with a dab of instant glue, and voila…

Camera enclosure

We’ve got ourselves a decent looking camera.


If you’re feeling fancy, buy a small wooden desk in a hobby shop, turn it upside down and you have yourself a docking station with easy mounting. You can see how mine came out in the gallery below.

Home Assistant Integration

To create a HomeAssistant entity, we have to add a new ESPHome device with this configuration, and upload the firmware to the board. The first firmware upload will have to go through a USB cable, but from then on, the over-the-air update will be available.

 ESPHome configuration
name: esp_cam
platform: ESP32
board: esp32cam
ssid: "**********"
password: "**********"
ssid: "Esp Cam Fallback Hotspot"
password: "***********"
# Enable logging
# Enable Home Assistant API
name: My Camera
pin: GPIO0
frequency: 20MHz
sda: GPIO26
scl: GPIO27
data_pins: [GPIO5, GPIO18, GPIO19, GPIO21, GPIO36, GPIO39, GPIO34, GPIO35]
vsync_pin: GPIO25
href_pin: GPIO23
pixel_clock_pin: GPIO22
power_down_pin: GPIO32
resolution: 640x480
jpeg_quality: 10

After uploading the firmware to the board via ESPHome, go to the HomeAssistant configuration page, and click Integrations. Configure the new entity which should appear when the ESP device connects to the Wi-Fi.

After adding the new integration, we can go ahead and create a new Lovelace card with the next configuration.

 Lovelace card configuration
type: picture-entity
entity: camera.my_camera

That’s it! Our camera stream is now shown in the Lovelace UI panel.

I mounted the camera at a fixed spot pointed at my balcony, created a NodeRED flow to take a photo every day at noon and upload it to an external storage drive. The idea is to create a time-lapse after a couple of months.

Homeasisstant Lovelace Card

NodeRED FlowWhat do you use your hobby cameras for? Feel free to share your projects in the comments. 🍻

The links to all components can be found at the top of the article. ☝️


Front view of the cameraSide view of the cameraTop view of the cameraTesting the functionality with Home Assistant

Ivan Lesar

About Ivan Lesar

Curious overthinker with a purpose to tinker. Software engineer with a background in mathematics.
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