Add UART transmitter/receiver example (#70)

.github/workflows/ci.yaml

@@ -36,6 +36,16 @@ jobs:
           pip install esphome
           pip list
           esphome version
+
+      - name: Write tests/secrets.yaml
+        shell: bash
+        run: 'echo -e "wifi_ssid: ssid\nwifi_password: password\nmqtt_host: host\nmqtt_username: username\nmqtt_password: password" > tests/secrets.yaml'
+      - name: Validate test configurations
+        run: |
+          for YAML in tests/esp*.yaml; do
+            esphome -s external_components_source ../components config $YAML >/dev/null
+          done
+
       - name: Write secrets.yaml
         shell: bash
         run: 'echo -e "wifi_ssid: ssid\nwifi_password: password\nmqtt_host: host\nmqtt_username: username\nmqtt_password: password" > secrets.yaml'

tests/esp32-uart-trx1.yaml

@@ -0,0 +1,41 @@
+substitutions:
+  name: uart-trx1
+  tx_pin: GPIO16
+  rx_pin: GPIO17
+
+esphome:
+  name: ${name}
+  min_version: 2024.6.0
+
+esp32:
+  board: wemos_d1_mini32
+  framework:
+    type: esp-idf
+
+wifi:
+  ssid: !secret wifi_ssid
+  password: !secret wifi_password
+
+ota:
+  platform: esphome
+
+logger:
+  level: DEBUG
+
+api:
+
+uart:
+  - id: uart_0
+    baud_rate: 9600
+    tx_pin: ${tx_pin}
+    rx_pin: ${rx_pin}
+    debug:
+      direction: BOTH
+      dummy_receiver: true
+
+interval:
+  - interval: 1s
+    then:
+      - uart.write:
+          id: uart_0
+          data: "Hello from ${name}"

tests/esp32-uart-trx2.yaml

@@ -0,0 +1,41 @@
+substitutions:
+  name: uart-trx2
+  tx_pin: GPIO16
+  rx_pin: GPIO17
+
+esphome:
+  name: ${name}
+  min_version: 2024.6.0
+
+esp32:
+  board: wemos_d1_mini32
+  framework:
+    type: esp-idf
+
+wifi:
+  ssid: !secret wifi_ssid
+  password: !secret wifi_password
+
+ota:
+  platform: esphome
+
+logger:
+  level: DEBUG
+
+api:
+
+uart:
+  - id: uart_0
+    baud_rate: 9600
+    tx_pin: ${tx_pin}
+    rx_pin: ${rx_pin}
+    debug:
+      direction: BOTH
+      dummy_receiver: true
+
+interval:
+  - interval: 1s
+    then:
+      - uart.write:
+          id: uart_0
+          data: "Hello from ${name}"