feat: sketch scaffold with I2C bus bring-up and scanner

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-17 19:30:34 +07:00
parent ffb2ac3756
commit 074bc99875
2 changed files with 61 additions and 0 deletions
@@ -0,0 +1,27 @@
+#include <Arduino.h>
+#include <Wire.h>
+#include "config.h"
+
+static void i2cScan() {
+  Serial.println(F("I2C scan:"));
+  byte found = 0;
+  for (byte addr = 1; addr < 127; addr++) {
+    Wire.beginTransmission(addr);
+    if (Wire.endTransmission() == 0) {
+      Serial.printf("  device at 0x%02X\n", addr);
+      found++;
+    }
+  }
+  Serial.printf("  %d device(s) found\n", found);
+}
+
+void setup() {
+  Serial.begin(115200);
+  delay(200);
+  Serial.println(F("\n=== Weather Predictor booting ==="));
+  Wire.begin(I2C_SDA, I2C_SCL);   // MUST come before any I2C driver begin()
+  i2cScan();
+}
+
+void loop() {
+}