Update encoding.c

Changes in BTHOME_V2 protocol:
- Reduce resolution of humidity and moisture to 1 byte
- Add battery percentage

code/nrf-connect/samples/ble/src/encoding.c

@@ -104,33 +104,36 @@ int prst_ble_encode_service_data(const prst_sensors_t* sensors,
   out[4] = temp_val & 0xff;
   out[5] = temp_val >> 8;
   // Humidity.
-  out[6] = 0x03;
-  // Value. Factor 0.01, over 100%.
-  uint16_t humi_val = 10000 * sensors->shtc3.rel_humi;
-  out[7] = humi_val & 0xff;
-  out[8] = humi_val >> 8;
+  out[6] = 0x2E;
+  // Value. Factor 1 over 100%.
+  uint8_t humi_val = 100*sensors->shtc3.rel_humi + 0.5f;
+  out[7] = humi_val;
   // Illuminance.
-  out[9] = 0x05;
+  out[8] = 0x05;
   // Value. Factor of 0.01.
   uint32_t lux_val = sensors->photo.brightness * 100;
-  out[10] = lux_val & 0xff;
-  out[11] = (lux_val >> 8) & 0xff;
-  out[12] = (lux_val >> 16) & 0xff;
+  out[9] = lux_val & 0xff;
+  out[10] = (lux_val >> 8) & 0xff;
+  out[11] = (lux_val >> 16) & 0xff;
   // Battery voltage.
-  out[13] = 0x0c;
+  out[12] = 0x0c;
   // Value. Factor of 0.001.
   uint16_t batt_val = sensors->batt.adc_read.millivolts;
-  out[14] = batt_val & 0xff;
-  out[15] = batt_val >> 8;
+  out[13] = batt_val & 0xff;
+  out[14] = batt_val >> 8;
   // Soil moisture.
-  out[16] = 0x14;
-  // Factor of 0.01, so we need to multiply our the value in 100% by 1/0.01 = 100.
-  uint16_t soil_val = 10000 * sensors->soil.percentage;
-  out[17] = soil_val & 0xff;
-  out[18] = soil_val >> 8;
+  out[15] = 0x2F;
+  // Factor of 1 over 100%
+  uint8_t soil_val = 100*sensors->soil.percentage + 0.5f;
+  out[16] = soil_val;
+  // Battery percentage.
+  out[17] = 0x01;
+  // Value. Factor 1 over 100%
+  uint8_t batt_percentage_val = 100*sensors->batt.percentage + 0.5f; 
+  out[18] = batt_percentage_val;
 
 #endif  // Encoding protocols
 
   LOG_HEXDUMP_DBG(out, out_len, "Encoded BLE adv: ");
   return 0;
-}
+}