Use the full pin schema and set inverted: true to invert logic levels. Rx_pin ( Optional, Pin): The pin to receive data on from the ESP’s perspective. Tx_pin ( Optional, Pin): The pin to send data to from the ESP’s perspective. # Example configuration entry uart : tx_pin : 1 rx_pin : 3 baud_rate : 9600 Configuration variables: ¶īaud_rate ( Required, int): The baud rate of the UART bus. In some cases only TX or RX exists as the device at the other end only accepts data or sends data. Receive/send data at using the baud_rate option. Need to try with the two pins switched if it doesn’t work immediately.Īdditionally, each UART bus can operate at different speeds (baud rates), so ESPHome needs to know what speed to it sends on pin B and receives on pin A). Perspective these two pins are switched (i.e. While the ESP might send ( TX) on pin A and receive ( RX) data on pin B, from the other device’s Please note that the naming of these two pins depends on the chosen perspective and can be ambiguous. RX: This line is used to receive data from the device at the other end. TX: This line is used to send data to the device at the other end. UART (or for Arduino often also called Serial) usually You have probably used UART to access the chip. For example, when uploading a binary to your ESP UART is a common serial protocol for a lot of devices.
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