---
title: "EC-M11-BC-C3-S – USER GUIDE"
description: "## Programming The NORVI EC-M11-BC-C3-S has a mini USB port for serial connection with the SoC for programming. Any ESP32-supported programming IDE can be used to program the controller. Follow this guide to programming NORVI ESP32-based controllers with the Arduino…"
url: "https://norvi.io/docs/norvi-ec-m11-eg-c3-s-user-guide-2/"
updated: "2026-03-20"
category: "OTHER PRODUCTS / EC-M11-BC LoRa / EC-M11-BC-C3-S"
---

# EC-M11-BC-C3-S – USER GUIDE

## Programming

The NORVI EC-M11-BC-C3-S has a mini USB port for serial connection with the SoC for programming. Any ESP32-supported programming IDE can be used to program the controller. Follow this guide to programming NORVI ESP32-based controllers with the Arduino IDE.

**SoC:**ESP32-WROOM32
**Programming Port:**USB UART

## Wiring Load Cell Input and Solar.

### 8-pin and 3-pin connectors and wire harness

![](https://norvi.io/wp-content/uploads/2024/09/df-1024x348-22.jpg)

### Pin Description

| **8P Male** | **Wire color** | **I/O Configuration** |
| --- | --- | --- |
| 1 | White | A+ |
| 2 | Brown | A- |
| 3 | Green | B+ |
| 4 | Yellow | B- |
| 5 | Gray | - |
| 6 | Pink | - |
| 7 | Blue | - |
| 8 | Red | - |

| **3P Male** | **Wire color** | **I/O Configuration** |
| --- | --- | --- |
| 1 | Blue | Solar Panel + |
| 2 | Black | Not in Use |
| 3 | Brown | Solar Panel - |

## Load Cell Inputs

### Programming Load Cell Inputs 

| Number of Load Cell Inputs | 1 |
| --- | --- |
| Module Type | HX711 |
| PD SCK | GPIO12 |
| DOUT | GPIO13 |

```cpp

                #include "HX711.h"
const int LOADCELL_DOUT_PIN = 13;
const int LOADCELL_SCK_PIN = 12;
HX711 scale;

void setup() {
  Serial.begin(115200);
  Serial.println("HX711 Demo");
  Serial.println("Initializing the scale");
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale(2280.f);
  // this value is obtained by calibrating the scale with known weights;
  scale.tare();                // reset the scale to 0
  Serial.println("After setting up the scale:");
  Serial.print("read: \t\t");
  Serial.println(scale.read());             // print a raw reading from the ADC
  Serial.print("read average: \t\t");
  Serial.println(scale.read_average(20));
  //print the average of 20 readings from the ADC
  Serial.print("get value: \t\t");
  Serial.println(scale.get_value(5));
  // print the average of 5 readings from the ADC minus the tare weight,
  //set with tare()
  Serial.print("get units: \t\t");
  Serial.println(scale.get_units(5), 1);
  // print the average of 5 readings from the ADC minus tare weight, divided
  Serial.println("Readings:");
}

void loop() {
  Serial.print("one reading:\t");
  Serial.print(scale.get_units(), 1);
  Serial.print("\t| average:\t");
  Serial.println(scale.get_units(10), 1);
}
```

## LoRa Transceiver Module

| Specification | Long Range(LoRa) |
| --- | --- |
| RF Transceiver | Order depending on regional regulations |
| SPI MISO | GPIO19 |
| SPI MOSI | GPIO23 |
| SPI SCK | GPIO18 |
| NSS | GPIO26 |
| DIO0 | GPIO25 |
| DIO1 | GPIO27 |
| DIO2 | NOT CONNECTED |
| RESET | GPIO15 |

### Programming LoRa Modules

```cpp

                #include <lmic.h>
#include <hal/hal.h>
#include <SPI.h>
#define CONFIRMED_MSG_RETRY_COUNT 3
static const u1_t PROGMEM APPEUI[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
void os_getArtEui (u1_t* buf) {
  memcpy_P(buf, APPEUI, 8);
}
static const u1_t PROGMEM DEVEUI[8] = {0x4B, 0x11, 0x3F, 0xB1, 0x3C, 0xBE, 0xD6, 0x56};
void os_getDevEui (u1_t* buf) {
  memcpy_P(buf, DEVEUI, 8);
}
static const u1_t PROGMEM APPKEY[16] = {0xF9, 0x65, 0xE4, 0xED, 0xFF, 0x8A, 0x89, 0x27, 0x23, 0xA6, 0xB7, 0x42, 0x2F, 0x05, 0x8E, 0x9F};
void os_getDevKey (u1_t* buf) {
  memcpy_P(buf, APPKEY, 16);
}
static uint8_t mydata[] = "Hello, world!";
static osjob_t sendjob;
const unsigned TX_INTERVAL = 60;
const lmic_pinmap lmic_pins = {
  .nss = 26,
  .rxtx = LMIC_UNUSED_PIN,
  .rst = 15,
  .dio = {25, 27, -1},
};
void printHex2(unsigned v) {
  v &= 0xff;
  if (v < 16)
    Serial.print('0');
  Serial.print(v, HEX);
}
```

## Solar Input

| Solar Powered Model | CN3083  |
| --- | --- |
| Maximum Charge Current |  600mA  |
| Maximum Voltage |  6V  |
| Input Voltage monitor |  ADS1115 - 0x49 - AIN2 |

## Battery Input

| Battery Type | 103040 Lithium polymer battery |
| --- | --- |
| Nominal Capacity  | 1200mAh   |
| Nominal Voltage | 3.75V |
| Overcharge | 4.2V |
| Over-discharge Cutoff Voltage | 3V |

### Programming Solar and Battery

```cpp

                #include <Adafruit_SSD1306.h>
#include <Adafruit_ADS1X15.h>
Adafruit_ADS1115 ads1;
int analog_value = 0;
void setup() {
  Serial.begin(115200);// put your setup code here, to run once:
  Wire.begin(16,17);
  if (!ads1.begin(0x49)) {
    Serial.println("Failed to initialize ADS 1 .");
    while (1);
  }
}
void loop() {
  int16_t adc0, adc1, adc2, adc3;
  adc0 = ads1.readADC_SingleEnded(0);
  adc1 = ads1.readADC_SingleEnded(1);
  adc2 = ads1.readADC_SingleEnded(2);
  adc3 = ads1.readADC_SingleEnded(3);
  Serial.println("-----------------------------------------------------------");
  Serial.print("AIN1: ");
  Serial.print(adc0);
  Serial.println("  ");
  Serial.print("AIN2: ");
  Serial.print(adc1);
  Serial.println("  ");
  Serial.print("SOLAR: ");
  Serial.print(adc2);
  Serial.println("  ");
  Serial.print("AIN4: ");
  Serial.print(adc3);
  Serial.println("  ");
}
```