From fd7c017a6fab43eb1e6fbc39a36b716359a4dc29 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Thu, 15 Jan 2026 09:08:54 +0100
Subject: Initial test setup

---
 hello-t-energy-s3.ino | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 hello-t-energy-s3.ino

(limited to 'hello-t-energy-s3.ino')

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);
+}
-- 
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