feat(wokwi-dht22/dht22-uno): initial test case

Author: urish

.github/workflows/wokwi-test.yml

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+name: Wokwi CI Test
+
+on:
+  push:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install PlatformIO
+        run: |
+          python -m pip install --upgrade pip
+          pip install platformio
+
+      - name: Build with PlatformIO
+        working-directory: wokwi-dht22/dht22-uno
+        run: pio run
+
+      - name: Run Wokwi CI Server
+        uses: wokwi/wokwi-ci-server-action@v1
+
+      - name: Test with Wokwi
+        uses: wokwi/wokwi-ci-action@v1
+        with:
+          token: ${{ secrets.WOKWI_CLI_TOKEN }}
+          path: wokwi-dht22/dht22-uno
+          timeout: 10000
+          scenario: dht22.test.yaml
+          serial_log_file: serial.log

.gitignore

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+.env.local
+.pio

README.md

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+# Wokwi Part Tests
+
+This repository contains a set of test projects for many Wokwi parts. The tests can be compiled 
+using platformio and then run using the Wokwi CLI.

wokwi-dht22/dht22-uno/dht22.test.yaml

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+name: 'DHT22 Sensor Test'
+version: 1
+author: 'Uri Shaked'
+
+steps:
+  - wait-serial: 'DHT22 test!'
+  # Wait for first reading
+  - delay: 2000ms
+  # Check exact temperature and humidity values
+  - wait-serial: 'Humidity: 45.80%  Temperature: 23.50°C'
+  # Wait for second reading to confirm consistency
+  - delay: 2000ms
+  - wait-serial: 'Humidity: 45.80%  Temperature: 23.50°C'

wokwi-dht22/dht22-uno/diagram.json

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+{
+  "version": 1,
+  "author": "Uri Shaked",
+  "editor": "wokwi",
+  "parts": [
+    {
+      "id": "uno",
+      "type": "wokwi-arduino-uno",
+      "top": 160,
+      "left": 20
+    },
+    {
+      "id": "dht",
+      "type": "wokwi-dht22",
+      "top": 0,
+      "left": 70,
+      "attrs": {
+        "temperature": "23.5",
+        "humidity": "45.8"
+      }
+    }
+  ],
+  "connections": [
+    ["uno:GND.1", "dht:GND", "black", ["v-20", "*", "v5"]],
+    ["uno:2", "dht:SDA", "green", ["v-16", "*", "h0"]],
+    ["uno:5V", "dht:VCC", "red", ["v20", "*", "h0"]]
+  ]
+} 

wokwi-dht22/dht22-uno/platformio.ini

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+[env:uno]
+platform = atmelavr
+board = uno
+framework = arduino
+lib_deps =
+    adafruit/DHT sensor library@^1.4.4
+    adafruit/Adafruit Unified Sensor@^1.1.9 

wokwi-dht22/dht22-uno/src/main.cpp

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+#include <Arduino.h>
+#include <DHT.h>
+
+#define DHTPIN 2     // Digital pin connected to the DHT sensor
+#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
+
+DHT dht(DHTPIN, DHTTYPE);
+
+void setup() {
+  Serial.begin(9600);
+  Serial.println(F("DHT22 test!"));
+  dht.begin();
+}
+
+void loop() {
+  // Wait a few seconds between measurements
+  delay(2000);
+
+  // Reading temperature or humidity takes about 250 milliseconds!
+  float h = dht.readHumidity();
+  // Read temperature as Celsius (the default)
+  float t = dht.readTemperature();
+  
+  // Check if any reads failed and exit early (to try again)
+  if (isnan(h) || isnan(t)) {
+    Serial.println(F("Failed to read from DHT sensor!"));
+    return;
+  }
+
+  Serial.print(F("Humidity: "));
+  Serial.print(h);
+  Serial.print(F("%  Temperature: "));
+  Serial.print(t);
+  Serial.println(F("°C "));
+} 

wokwi-dht22/dht22-uno/wokwi.toml

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+[wokwi]
+version = 1
+firmware = '.pio/build/uno/firmware.hex'
+elf = '.pio/build/uno/firmware.elf'