diff --git a/README.md b/README.md index 13ebc12..903e7d4 100644 --- a/README.md +++ b/README.md @@ -139,3 +139,19 @@ A valid configuration may look like [this](examples/zones.yaml) or this: x: 6m y: 0m ``` + +## Troubleshooting + +When using Dupont connectors make sure they make proper contact. The very short pins on the LD2450 Sensor can easily go loose or break. + +I recommend using a `5V` power supply and the `5V` input pin whenever possible. +Using the the `3.3V` pin on the LD2450 sensor may cause instabilities during operation depending on the power supply, voltage regulator and other components used on the same power circuit. +In a test scenario using a `3.3V` voltage regulator, an ESP-01 and a DHT22 the LD2450 sensor was not able to provide measurements. Observing the LD2450's TX pin using an oscilloscope yielded no updates and noisy behavior around `3.3V`. Switching to `5V` on the LD2450 sensor resolved this issue and consistent updates from the sensor were observed. +In a different scenario, when using `3.3V` provided by an ESP32 development board, sensor updates arrived inconsistently/went missing. + +In some configurations, this LD2450 component may not perform ideally. If this component is used in combination with other components on a single ESP, especially ones that require long processing times, some updates provided by the sensor may be missed. As a symptom (zone) count sensors may report as `Unknown` for short periods of time and switches become unresponsive. +If this is the case try the following steps: + +- increase `rx_buffer_size` +- use a minimal ESPHome yaml configuration for troubleshooting +- use a reliable `5V` power source for the sensor