Manual & Safety
LinkGear CO2 Ampel for ESPHome
Model LG-ECA1
Thank you for choosing the LinkGear CO2 Ampel Multisensor-Board for ESPHome!
Package Contents1 x LinkGear CO2 Ampel (opt. 1 x Enclosure)
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⚠ WARNINGS & Safety Information
- Before using the device, carefully read this manual.
- Keep this manual either downloaded or printed in a safe place for later use. It contains important information.
- Never connect the device to 230/110/mains voltage! This is extremely dangerous.
- Avoid placing any objects that could short-circuit any connections on the PCB.
- Securely connect the cables to the device. Only use power supplies rated 5V 1.5A.
- Securely mount the device on a stable, level surface to prevent it from falling.
- Do not cover or obstruct the device to allow for proper heat dissipation and accurate measurements.
- The device should not be opened or repaired by unauthorized personnel.
- The device must not be used in wet or humid environments to prevent water or moisture damage.
- Only use the device within the specified limits.
- When powering from an external power source, do not simultaneously connect the USB Type-C.
- Disconnect the external power before flashing.
- Using the PCB within an enclosure is highly recommended to avoid damage to the product itself. Warranty claims arising from issues caused by the absence of an enclosure will be denied.
- This device is not for use in medical applications or wherever life might be at risk!
Technical Specification
| Input voltage/current | 5V 1.5A |
| Ports |
1 x USB Type-C (power and serial) 1 x QWIIC i2c 1 x 4 pin i2c (P2.50) |
| Microcontroller | ESP32-WROOM-32E (8MB) pre-flashed with ESPHome |
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Sensor CO2 (Carbon Dioxide ) |
Sensirion SCD41 Photoacoustic NDIR sensor technology PASens® Measurement Range: 0 - 40,000 ppm Sensor lifetime >10 years Datasheet |
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Sensor Temperature, Humidity, Pressure |
Bosch BME280 Temperature Range: -40 - 65° C Pressure Range: 300 - 1100 hPa Humidity Range: 0 - 100 %RH |
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Sensor Illuminance |
ROHM Semi BH1750FVI-TR |
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Buzzer |
MLT-8530 |
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LEDs |
8 LEDs SK6812 in a ring formation |
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USB to Serial Chipset |
Skyworks/Silicon Labs CP2102N |
| Protections | Wrong polarity protection |
| Operating temperature | -10 to +55 °C |
| Operating humidity | 10 – 90% (non condensing) |
| Storage temperature | +10 to +50 °C |
| Safety Standard Compliance | CE, RoHS compliant |
Compliance
Additional (compliance) labels for your region may be found on the packaging or the device itself.
Disposal
This appliance complies with the European Union's WEEE directive (2012/19/EU) on responsible end-of-life handling.
- Packaging: Eco-friendly materials make it easy to recycle. Send that cardboard on its next adventure, or recycle it accordingly.
- Waste equipment: Don't let it gather dust! Your local retailer or recycling center gladly welcomes it back for reuse or responsible recycling. Ask them for the latest disposal routes, and watch your old appliance become something new!
If you have any issues, please contact our support team.
Installation
The LinkGear CO2 Ampel comes pre-flashed with ESPHome. The device is useable out of the box without any connectivity, but its true magic is unleashed by integrating it into Home Assistant. If you want to flash ESPHome yourself, you can find the stock configuration on the GitHub page.
Connecting to WiFi
There are two ways to connect the device to WiFi quickly. The recommended method is using Improv, which works over serial and Bluetooth. This is also available on the LinkGear Web Flasher. Alternatively, you can use the onboard access point by choosing the open WiFi and navigating your browser to 192.168.4.1.
Connecting via Serial
If the serial port does not open on your computer, please download the drivers for the serial chip CP2102N over at silabs.
Operation
It is recommended that you use a standard USB Type-C cable and a power supply that can continuously supply 5V 1.5A. The device does not have a power button and will turn on as soon as it is plugged in. It is designed for continuous operation and can stay plugged in as long as it is used within specification.
With the default firmware, the device uses the following LED colors to display the current CO2 values:
| CO2 Level (PPM) | LED Color |
|---|---|
| Below 800 | Green |
| 800 - 1199 | Yellow |
| 1200 - 1499 | Orange |
| 1500 and above | Red |
Flashing new Firmware
This device can be flashed using serial, the easiest way is using the LinkGear Web Flasher.
Maintenance
Maintain the device's cleanliness by regularly wiping the enclosure with a dry, lint-free cloth. Do not use harsh chemicals or abrasive materials to clean the device, as these may scratch or damage its surface. Never attempt to clean sensors by any means, including pressured air - you can permanently damage the sensor.
Designed & Imported by performeon GmbH, Rodgasse 5, 97828 Marktheidenfeld, Germany
support@linkgear.net ● +49 (0) 9391 6099 880
This device is "Made for ESPHome" approved and meets the standards and criteria outlined by Nabu Casa/ESPHome.
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