Initial test setup

1 files changed, 21 insertions, 0 deletions

diff --git a/hello-t-energy-s3.ino b/hello-t-energy-s3.ino
new file mode 100644
index 0000000..fd0a05d
--- /dev/null
+++ b/hello-t-energy-s3.ino
@@ -0,0 +1,21 @@
+// Minimal T-Energy-S3 test
+// Reads battery voltage and prints to USB serial
+
+#define BATTERY_PIN 3
+
+void setup() {
+    Serial.begin(115200);
+    delay(2000);  // Wait for USB CDC to initialize
+
+    Serial.println("Hello T-Energy-S3!");
+
+    pinMode(BATTERY_PIN, INPUT);
+    analogReadResolution(12);
+    analogSetPinAttenuation(BATTERY_PIN, ADC_11db);
+}
+
+void loop() {
+    int mv = analogReadMilliVolts(BATTERY_PIN) * 2;  // Voltage divider on board
+    Serial.printf("Battery: %d mV\n", mv);
+    delay(2000);
+}