diff --git a/bbn_m5atomS3_lite_env/bbn_m5atomS3_lite_env.ino b/bbn_m5atomS3_lite_env/bbn_m5atomS3_lite_env.ino
new file mode 100644
index 0000000..6c95621
--- /dev/null
+++ b/bbn_m5atomS3_lite_env/bbn_m5atomS3_lite_env.ino
@@ -0,0 +1,45 @@
+#include <M5AtomS3.h>
+#include <Arduino.h>
+#include <M5UnitENV.h>
+#include <Wire.h>
+#include "NmeaXDR.h"
+
+DHT12 dht;
+BMP280 bmp;
+
+void setup() {
+  auto cfg = M5.config();
+  AtomS3.begin(cfg);
+  Wire.begin();
+  Serial.begin(4800);
+
+  if (!dht.begin(&Wire, DHT12_I2C_ADDR, G2, G1, 100000U)) {
+    Serial.println("Couldn't find DHT12");
+    while (1) delay(1);
+  }
+
+  if (!bmp.begin(&Wire, BMP280_I2C_ADDR, G2, G1, 100000U)) {
+    Serial.println("Couldn't find BMP280");
+    while (1) delay(1);
+  }
+
+  /* Default settings from datasheet. */
+  bmp.setSampling(BMP280::MODE_NORMAL,     /* Operating Mode. */
+                  BMP280::SAMPLING_X2,     /* Temp. oversampling */
+                  BMP280::SAMPLING_X16,    /* Pressure oversampling */
+                  BMP280::FILTER_X16,      /* Filtering. */
+                  BMP280::STANDBY_MS_500); /* Standby time. */
+}
+
+void loop() {
+  if (dht.update()) {
+    gen_nmea0183_xdr("$BBXDR,H,%.2f,P,HUMI_DHT12", dht.humidity);   // %
+    gen_nmea0183_xdr("$BBXDR,C,%.2f,C,TEMP_DHT12", dht.cTemp);      // C
+  }
+
+  if (bmp.update()) {
+    gen_nmea0183_xdr("$BBXDR,C,%.2f,C,TEMP_BMP280", bmp.cTemp);        // C
+    gen_nmea0183_xdr("$BBXDR,P,%.2f,P,PRES_BMP280", bmp.pressure);     // Pa
+  }
+  delay(1000);
+}