chris/Ambient_Light_Sensor
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Initial commit.

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Sensors, WiFi, MQTT functional.
This commit is contained in:
Chris Trimble 2024-05-18 09:41:44 -05:00
commit 2ca6ef7017
7 changed files with 396 additions and 0 deletions
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.gitignore vendored Normal file
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.pio
.vscode/.browse.c_cpp.db*
.vscode/c_cpp_properties.json
.vscode/launch.json
.vscode/ipch

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{
// See http://go.microsoft.com/fwlink/?LinkId=827846
// for the documentation about the extensions.json format
"recommendations": [
"platformio.platformio-ide"
],
"unwantedRecommendations": [
"ms-vscode.cpptools-extension-pack"
]
}

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This directory is intended for project header files.
A header file is a file containing C declarations and macro definitions
to be shared between several project source files. You request the use of a
header file in your project source file (C, C++, etc) located in `src` folder
by including it, with the C preprocessing directive `#include'.
```src/main.c
#include "header.h"
int main (void)
{
...
}
```
Including a header file produces the same results as copying the header file
into each source file that needs it. Such copying would be time-consuming
and error-prone. With a header file, the related declarations appear
in only one place. If they need to be changed, they can be changed in one
place, and programs that include the header file will automatically use the
new version when next recompiled. The header file eliminates the labor of
finding and changing all the copies as well as the risk that a failure to
find one copy will result in inconsistencies within a program.
In C, the usual convention is to give header files names that end with `.h'.
It is most portable to use only letters, digits, dashes, and underscores in
header file names, and at most one dot.
Read more about using header files in official GCC documentation:
* Include Syntax
* Include Operation
* Once-Only Headers
* Computed Includes
https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

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This directory is intended for project specific (private) libraries.
PlatformIO will compile them to static libraries and link into executable file.
The source code of each library should be placed in an own separate directory
("lib/your_library_name/[here are source files]").
For example, see a structure of the following two libraries `Foo` and `Bar`:
|--lib
| |
| |--Bar
| | |--docs
| | |--examples
| | |--src
| | |- Bar.c
| | |- Bar.h
| | |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
| |
| |--Foo
| | |- Foo.c
| | |- Foo.h
| |
| |- README --> THIS FILE
|
|- platformio.ini
|--src
|- main.c
and a contents of `src/main.c`:
```
#include <Foo.h>
#include <Bar.h>
int main (void)
{
...
}
```
PlatformIO Library Dependency Finder will find automatically dependent
libraries scanning project source files.
More information about PlatformIO Library Dependency Finder
- https://docs.platformio.org/page/librarymanager/ldf.html

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; PlatformIO Project Configuration File
;
; Build options: build flags, source filter
; Upload options: custom upload port, speed and extra flags
; Library options: dependencies, extra library storages
; Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html
[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
upload_speed = 921600
upload_port = COM5
lib_deps =
adafruit/Adafruit VEML7700 Library@^2.1.6
adafruit/Adafruit INA219@^1.2.3
jeremycole/I2C Temperature Sensors derived from the LM75@^1.0.3
knolleary/PubSubClient@^2.8
[env:esp32dev_ota]
platform = espressif32
board = esp32dev
framework = arduino
upload_protocol = espota
upload_port = 10.0.2.10
upload_flags =
--auth=solar_sensor_array
lib_deps =
adafruit/Adafruit VEML7700 Library@^2.1.6
adafruit/Adafruit INA219@^1.2.3
jeremycole/I2C Temperature Sensors derived from the LM75@^1.0.3
knolleary/PubSubClient@^2.8

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/*
Ambient Light Sensor
Notes:
If lux value changes by more than X ammount, immediately publish
Not as realavant once deep sleep is enabled
*/
#include <Arduino.h>
#include <WiFi.h>
#include <ESPmDNS.h>
// #include <NetworkUdp.h>
#include <ArduinoOTA.h>
#include "Adafruit_VEML7700.h"
#include "Adafruit_INA219.h"
#include <Temperature_LM75_Derived.h>
#include <PubSubClient.h>
#define AUX_POWER_ENABLE_PIN (5u)
// WiFi Setup
const char *ssid = "RAX";
const char *password = "G9REHYRRY9";
const IPAddress IP = IPAddress(10, 0, 2, 10);
const IPAddress GW = IPAddress(10, 0, 0, 1);
const IPAddress SN = IPAddress(255, 255, 0, 0);
const IPAddress DNS = IPAddress(10, 0, 0, 1);
const char *hostname = "sensor_array";
// Sensor Setup
Adafruit_VEML7700 veml = Adafruit_VEML7700();
Adafruit_INA219 ina219;
Generic_LM75_12Bit board_temp;
// MQTT Setup
const char* MQTT_SERVER = "homeassistant.local";
const uint32_t MQTT_PORT = 1883;
const char* MQTT_USERNAME = "chris";
const char* MQTT_PASSWORD = "Falcon(91)";
WiFiClient client;
PubSubClient mqtt(MQTT_SERVER, MQTT_PORT, client);
const char* MQTT_TOPIC = "test/lux";
char mqtt_buf[256];
void poll_INA219(void);
void init_OTA(void);
void setup()
{
pinMode(AUX_POWER_ENABLE_PIN, OUTPUT);
digitalWrite(AUX_POWER_ENABLE_PIN, LOW);
Serial.begin(115200);
Serial.println("Starting sensor array...");
// MCP9800 temp alert pin
pinMode(16, INPUT_PULLUP);
Wire.begin(23, 22);
if (!veml.begin())
{
Serial.println("VEML7700 not found.");
}
Serial.println("VEML7700 found.");
Serial.print(F("Gain: "));
switch (veml.getGain())
{
case VEML7700_GAIN_1:
Serial.println("1");
break;
case VEML7700_GAIN_2:
Serial.println("2");
break;
case VEML7700_GAIN_1_4:
Serial.println("1/4");
break;
case VEML7700_GAIN_1_8:
Serial.println("1/8");
break;
}
Serial.print(F("Integration Time (ms): "));
switch (veml.getIntegrationTime())
{
case VEML7700_IT_25MS:
Serial.println("25");
break;
case VEML7700_IT_50MS:
Serial.println("50");
break;
case VEML7700_IT_100MS:
Serial.println("100");
break;
case VEML7700_IT_200MS:
Serial.println("200");
break;
case VEML7700_IT_400MS:
Serial.println("400");
break;
case VEML7700_IT_800MS:
Serial.println("800");
break;
}
// ina219 input voltage and current
if (!ina219.begin())
{
Serial.println("INA219 not found.");
}
Serial.println("INA219 found.");
ina219.setCalibration_16V_400mA();
// board temperature sensor
board_temp.setAlertActiveHigh();
board_temp.setTemperatureHighC(70);
board_temp.setTemperatureLowC(2);
WiFi.mode(WIFI_STA);
WiFi.config(IP, GW, SN, DNS);
WiFi.setHostname(hostname);
WiFi.begin(ssid, password);
while (WiFi.waitForConnectResult() != WL_CONNECTED)
{
Serial.println("Connection Failed! Rebooting...");
delay(5000);
ESP.restart();
}
ArduinoOTA.setPassword("solar_sensor_array");
init_OTA();
ArduinoOTA.begin();
if (mqtt.connect("sensor_array", MQTT_USERNAME, MQTT_PASSWORD))
{
Serial.println("MQTT: Connected to server.");
}
}
void loop()
{
static uint32_t prev_millis = 5000;
static uint32_t slow_loop_millis = 60000;
ArduinoOTA.handle();
// MQTT handler
mqtt.loop();
if ((millis() - prev_millis) >= 5000)
{
prev_millis = millis();
Serial.print("raw ALS: ");
Serial.println(veml.readALS());
Serial.print("raw white: ");
Serial.println(veml.readWhite());
Serial.print("lux: ");
Serial.println(veml.readLux(VEML_LUX_AUTO));
// poll_INA219();
Serial.printf("T = %02.1f\r\n", board_temp.readTemperatureF());
if (digitalRead(AUX_POWER_ENABLE_PIN))
{
digitalWrite(AUX_POWER_ENABLE_PIN, LOW);
}
else
{
digitalWrite(AUX_POWER_ENABLE_PIN, HIGH);
}
}
if ((millis() - slow_loop_millis) >= 60000)
{
slow_loop_millis = millis();
sprintf(mqtt_buf, "{\"lux\":%5.2f,\n\"bus_voltage\":%2.2f,\n\"current_ma\":%3.2f,\n\"temperature\":%2.2f}",
veml.readLux(VEML_LUX_AUTO), ina219.getBusVoltage_V(), ina219.getCurrent_mA(), board_temp.readTemperatureF());
mqtt.publish(MQTT_TOPIC, mqtt_buf);
}
}
void poll_INA219(void)
{
float shuntvoltage = 0;
float busvoltage = 0;
float current_mA = 0;
float loadvoltage = 0;
float power_mW = 0;
shuntvoltage = ina219.getShuntVoltage_mV();
busvoltage = ina219.getBusVoltage_V();
current_mA = ina219.getCurrent_mA();
power_mW = ina219.getPower_mW();
loadvoltage = busvoltage + (shuntvoltage / 1000);
Serial.print("Bus Voltage: ");
Serial.print(busvoltage);
Serial.println(" V");
Serial.print("Shunt Voltage: ");
Serial.print(shuntvoltage);
Serial.println(" mV");
Serial.print("Load Voltage: ");
Serial.print(loadvoltage);
Serial.println(" V");
Serial.print("Current: ");
Serial.print(current_mA);
Serial.println(" mA");
Serial.print("Power: ");
Serial.print(power_mW);
Serial.println(" mW");
Serial.println("");
}
void init_OTA(void)
{
ArduinoOTA
.onStart([]()
{
String type;
if (ArduinoOTA.getCommand() == U_FLASH) {
type = "sketch";
} else { // U_SPIFFS
type = "filesystem";
}
// NOTE: if updating SPIFFS this would be the place to unmount SPIFFS using SPIFFS.end()
Serial.println("Start updating " + type); })
.onEnd([]()
{ Serial.println("\nEnd"); })
.onProgress([](unsigned int progress, unsigned int total)
{ Serial.printf("Progress: %u%%\r", (progress / (total / 100))); })
.onError([](ota_error_t error)
{
Serial.printf("Error[%u]: ", error);
if (error == OTA_AUTH_ERROR) {
Serial.println("Auth Failed");
} else if (error == OTA_BEGIN_ERROR) {
Serial.println("Begin Failed");
} else if (error == OTA_CONNECT_ERROR) {
Serial.println("Connect Failed");
} else if (error == OTA_RECEIVE_ERROR) {
Serial.println("Receive Failed");
} else if (error == OTA_END_ERROR) {
Serial.println("End Failed");
} });
}

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This directory is intended for PlatformIO Test Runner and project tests.
Unit Testing is a software testing method by which individual units of
source code, sets of one or more MCU program modules together with associated
control data, usage procedures, and operating procedures, are tested to
determine whether they are fit for use. Unit testing finds problems early
in the development cycle.
More information about PlatformIO Unit Testing:
- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html