Network From Solar Street-Lamps

1/*
22020-08-06 by Marcos Ortega
3Project: https://create.arduino.cc/projecthub/marcosjom/network-from-solar-street-lamps-e39e39
4
5This  code constantly reads the input from two voltage and current sensors,
6builds  and average about every 100ms, and 10 avgs for each second.
7
8Each second an  output is send to the serial port in CSV format, using tabulations as separator,  as example:
9
10Bat  14.48 v -0.684  a Pnl 0.00  v 0.293 a
11Bat 14.48 v -0.586  a Pnl 0.00  v 0.342 a
12Bat 14.45 v -0.586  a Pnl 0.00  v 0.293 a
13Bat 14.45  v -0.684  a Pnl 0.00  v 0.244 a
14Bat 14.45 v -0.684  a Pnl 0.06  v 0.244 a
15Bat  14.70 v -0.635  a Pnl 0.06  v 0.195 a
16
17A buzzer beeps every 3 secons.
18
19*/
20
21//---------
22//-  Header declarations
23//---------
24
25//Analog read
26
27typedef enum ENAnalogSampleType_  {
28  ENAnalogSampleType_BatteryV = 0,
29  ENAnalogSampleType_BatteryA,
30  ENAnalogSampleType_PanelV,
31  ENAnalogSampleType_PanelA,
32  ENAnalogSampleType_Count
33} ENAnalogSampleType;
34
35typedef  struct STNBAnalogClock_ {
36  unsigned long     readLastTime    = 0; //Last time  a sample was read
37  unsigned long     readWaitAccum   = 0; //Time accumulated  since last read
38  unsigned long     readsCount      = 0; //Ammount of read accumulated
39  int               avgsCount       = 0; //Ammount of avgs populated
40  int               avgsIdxLast     = 0; //Latest avg idx on circular queue
41} STNBAnalogClock;
42
43typedef  struct STNBAnalogSample_ {
44  int pin                 = A0; //analog pin
45  unsigned  long accum     = 0;  //current accumulation
46  int avgs[10]            = { 0,  0, 0, 0, 0, 0, 0, 0, 0, 0 };
47} STNBAnalogSample;
48
49typedef struct STNBAnalogReader_  {
50  STNBAnalogClock    aClock; //reads coordinator
51  STNBAnalogSample   samples[ENAnalogSampleType_Count];  //samples
52} STNBAnalogReader;
53
54//Buzzer
55
56typedef struct STNBBuzzer_  {
57  const int pin             = 52; //pin
58  unsigned long lastActTime = 0;  //Last time a beep was made
59  unsigned long waitAccum   = 0;  //Time accumulated  since last beep
60} STNBBuzzer;
61
62//Config
63
64typedef struct STNBCfg_  {
65  //------
66  //System
67  //------
68  struct {
69    //Arduino reference  voltage
70    const float voltsRef = 5.0f; //(verify yours with a multimeter)
71  } sys;
72  //------
73  //Voltage sensor
74  //------
75  struct {
76    //Manual  divider
77    struct {
78      const float r1 = 33000.f; //ohms
79      const  float r2 = 4700.f; //ohms
80    } divider;
81    //Pre-made module
82    struct  {
83      const float r1 = 30000.f; //ohms
84      const float r2 =  7500.f; //ohms
85    } module;
86  } voltage;
87  //------
88  //Current sensor
89  //------
90  struct {
91    //Pre-made module
92    struct {
93      //ACS712 ELC-05; +/-  5A; 185 mV/A
94      //ACS712 ELC-20; +/- 20A; 100 mV/A
95      //ACS712 ELC-30;  +/- 30A; 66 mV/A
96      const float miliVoltsPerAmp = 100.f;
97    } module;
98  } current;
99} STNBCfg;
100
101//---------
102//- Global objects
103//---------
104
105STNBAnalogReader  state;
106STNBBuzzer buzzer;
107STNBCfg cfg;
108
109//---------
110//- Methods forward  declaration
111//---------
112
113//Get the raw avg of all samples collected in  the avgs-circular-queue
114int samplesAvg(const STNBAnalogSample* src);
115
116//Get  the avg in voltage value collected from the voltage-sensor-module.
117float samplesAvgAsVoltageFromSensor(const  STNBAnalogSample* src);
118
119//Get the avg in voltage value collected from the  divider made with resistor.
120float samplesAvgAsVoltageFromDivider(const STNBAnalogSample*  src);
121
122//Get the avg in current (amps) value collected from the current-sensor-module
123float  samplesAvgAsAmps(const STNBAnalogSample* src);
124
125//---------
126//- Setup
127//---------
128
129void  setup() {
130  //Init serial
131  {
132    Serial.begin(9600);
133    while (!Serial)  {
134      ; // wait for serial port to connect. Needed for Native USB only
135    }
136  }
137  //Turn off builtin-led
138  {
139    pinMode(LED_BUILTIN, OUTPUT);
140    digitalWrite(LED_BUILTIN, LOW);
141  }
142  //Buzzer
143  {
144    pinMode(buzzer.pin,  OUTPUT);// set digital IO pin pattern, OUTPUT to be output 
145    buzzer.lastActTime  = micros();
146    buzzer.waitAccum = 0;
147  }
148  //Init analog reader
149  {
150    state.aClock.readLastTime  = micros();
151    state.aClock.readWaitAccum = 0;
152    state.aClock.readsCount    = 0;
153    state.aClock.avgsCount     = 0;
154    state.aClock.avgsIdxLast   = 0;
155    {
156      int i; for(i = 0; i < ENAnalogSampleType_Count; i++){
157        STNBAnalogSample* ss = &state.samples[i];
158        //Pin
159        switch(i){
160          case ENAnalogSampleType_BatteryV:
161            ss->pin = A1;
162            break;
163          case ENAnalogSampleType_BatteryA:
164            ss->pin = A2;
165            break;
166          case ENAnalogSampleType_PanelV:
167            ss->pin = A3;
168            break;
169          case ENAnalogSampleType_PanelA:
170            ss->pin = A4;
171            break;
172          default:
173            //Error
174            ss->pin = A0;
175            break;
176        }
177        //Zeroes
178        ss->accum = 0;
179        {
180          int  i; for(i = 0; i < (sizeof(ss->avgs) / sizeof(ss->avgs[0])); i++){
181            ss->avgs[i]  = 0;
182          }
183        }
184      }
185    }
186  }
187}
188
189//---------
190//-  Loop
191//---------
192
193void loop() {
194  unsigned long curTime = micros();
195  //Tick for IR detection
196  {
197    STNBAnalogClock* coord = &state.aClock;
198    //Accumulate time
199    if(coord->readLastTime < curTime){
200      coord->readWaitAccum  += curTime - coord->readLastTime;
201    } else {
202      coord->readWaitAccum  = (4294967295 - coord->readLastTime) + curTime;
203    }
204    //Do one-tick action
205    {
206      int i; for(i = 0; i < ENAnalogSampleType_Count; i++){
207        STNBAnalogSample*  ss = &state.samples[i];
208        const int val =  analogRead(ss->pin);
209        ss->accum  += val;
210      }
211      coord->readsCount++;
212    }
213    //Process accumulated  events
214    while(coord->readWaitAccum > 1000000){
215      const int avgsArrSz  = (sizeof(state.samples[0].avgs) / sizeof(state.samples[0].avgs[0]));
216      {
217        //Move index
218        if(coord->avgsCount != 0){
219          coord->avgsIdxLast++;
220          if(coord->avgsIdxLast == avgsArrSz){
221            coord->avgsIdxLast  = 0;
222          }
223        }
224        //Populate slots
225        {
226          if(coord->readsCount  > 0){
227            int i; for(i = 0; i < ENAnalogSampleType_Count; i++){
228              STNBAnalogSample*  ss = &state.samples[i];
229              ss->avgs[coord->avgsIdxLast] = ss->accum  / coord->readsCount;
230            }
231          } else {
232            int i;  for(i = 0; i < ENAnalogSampleType_Count; i++){
233              STNBAnalogSample*  ss = &state.samples[i];
234              ss->avgs[coord->avgsIdxLast] = 0;
235            }
236          }
237        }
238        //Increase count
239        if(coord->avgsCount  < avgsArrSz){
240          coord->avgsCount++;
241        }
242        //Calculate  avgs and print
243        {
244          if(coord->avgsIdxLast == avgsArrSz - 1){
245            //Battery
246            {
247              const float avgV  = samplesAvgAsVoltageFromSensor(&state.samples[ENAnalogSampleType_BatteryV]);
248              const float avgA  = samplesAvgAsAmps(&state.samples[ENAnalogSampleType_BatteryA]);
249              Serial.print("Bat\	"); 
250              Serial.print(avgV, 2);  Serial.print("\	v\	");
251              Serial.print(avgA, 3); Serial.print("\	a\	");
252            }
253            //Panel
254            {
255              const float  avgV  = samplesAvgAsVoltageFromDivider(&state.samples[ENAnalogSampleType_PanelV]);
256              const float avgA  = samplesAvgAsAmps(&state.samples[ENAnalogSampleType_PanelA]);
257              Serial.print("Pnl\	"); 
258              Serial.print(avgV, 2);  Serial.print("\	v\	");
259              Serial.print(avgA, 3); Serial.print("\	a\	");
260            }
261            Serial.print("\
262");
263           }
264        }
265        //Reset counters
266        {
267          int i; for(i = 0; i < ENAnalogSampleType_Count;  i++){
268            STNBAnalogSample* ss = &state.samples[i];
269            ss->accum  = 0;
270          }
271        }
272        coord->readsCount = 0;
273      }
274      coord->readWaitAccum -= 100000;
275    }
276    //Keep time
277    coord->readLastTime  = curTime;
278    //Beep and delay
279    {
280      //Accumulate time
281      if(buzzer.lastActTime  < curTime){
282        buzzer.waitAccum += curTime - buzzer.lastActTime;
283      }  else {
284        buzzer.waitAccum = (4294967295 - buzzer.lastActTime) + curTime;
285      }
286      buzzer.lastActTime = curTime;
287      //
288      if(buzzer.waitAccum  > 3000000){
289        //Delay by beeing
290        int i; for(i = 0;i < 10; i++){  // output a frequency sound
291          digitalWrite(buzzer.pin, HIGH);// sound
292          delay(1);
293          digitalWrite(buzzer.pin, LOW);//not sound
294          delay(1);
295        }
296        buzzer.waitAccum = 0;
297      } else {
298        //dealy  one tick next read
299        delay(10);
300      }
301    }
302  }
303}
304
305//Get  the raw avg of all samples collected in the avgs-circular-queue
306int samplesAvg(const  STNBAnalogSample* src){
307  int total = 0, count = 0, i;
308  for(i = 0; i < (sizeof(src->avgs)  / sizeof(src->avgs[0])); i++){
309    total += src->avgs[i];
310    count++;
311    break;
312  }
313  return total / count;
314}
315
316//Get the avg in voltage  value collected from the voltage-sensor-module.
317float samplesAvgAsVoltageFromSensor(const  STNBAnalogSample* src){
318  const float value = samplesAvg(src);
319  const float  vout  = (value * cfg.sys.voltsRef) / 1024.0f;
320  const float vin = vout / ( cfg.voltage.module.r2  / (cfg.voltage.module.r1 + cfg.voltage.module.r2) ); 
321  return vin;
322}
323
324//Get  the avg in voltage value collected from the divider made with resistor.
325float  samplesAvgAsVoltageFromDivider(const STNBAnalogSample* src){
326  const float value  = samplesAvg(src);
327  const float vout  = (value * cfg.sys.voltsRef) / 1024.0f;
328  const float vin = vout / ( cfg.voltage.divider.r2 / (cfg.voltage.divider.r1 +  cfg.voltage.divider.r2) ); 
329  return vin;
330}
331
332//Get the avg in current  (amps) value collected from the current-sensor-module
333float samplesAvgAsAmps(const  STNBAnalogSample* src){
334  const int adcValAbs     = samplesAvg(src); //From 0  to 1024
335  const int adcValSign    = adcValAbs - (1024 / 2); //From -512 to 512
336  const float adcValSignRel = (float)adcValSign / (float)(1024 / 2); //From -1.0f  to 1.0f
337  const float adcMiliVolts = adcValSignRel * (cfg.sys.voltsRef * 1000.0f  / 2.0f);
338  const float currentValue = adcMiliVolts /  cfg.current.module.miliVoltsPerAmp;
339  return currentValue; //+ 0.1465; //adjustment
340}
341
342//------------
343//End-of-program
344//------------
345

/*
2020-08-06 by Marcos Ortega
Project: https://create.arduino.cc/projecthub/marcosjom/network-from-solar-street-lamps-e39e39

This  code constantly reads the input from two voltage and current sensors,
builds  and average about every 100ms, and 10 avgs for each second.

Each second an  output is send to the serial port in CSV format, using tabulations as separator,  as example:

Bat  14.48 v -0.684  a Pnl 0.00  v 0.293 a
Bat 14.48 v -0.586  a Pnl 0.00  v 0.342 a
Bat 14.45 v -0.586  a Pnl 0.00  v 0.293 a
Bat 14.45  v -0.684  a Pnl 0.00  v 0.244 a
Bat 14.45 v -0.684  a Pnl 0.06  v 0.244 a
Bat  14.70 v -0.635  a Pnl 0.06  v 0.195 a

A buzzer beeps every 3 secons.

*/

//---------
//-  Header declarations
//---------

//Analog read

typedef enum ENAnalogSampleType_  {
  ENAnalogSampleType_BatteryV = 0,
  ENAnalogSampleType_BatteryA,
  ENAnalogSampleType_PanelV,
  ENAnalogSampleType_PanelA,
  ENAnalogSampleType_Count
} ENAnalogSampleType;

typedef  struct STNBAnalogClock_ {
  unsigned long     readLastTime    = 0; //Last time  a sample was read
  unsigned long     readWaitAccum   = 0; //Time accumulated  since last read
  unsigned long     readsCount      = 0; //Ammount of read accumulated
  int               avgsCount       = 0; //Ammount of avgs populated
  int               avgsIdxLast     = 0; //Latest avg idx on circular queue
} STNBAnalogClock;

typedef  struct STNBAnalogSample_ {
  int pin                 = A0; //analog pin
  unsigned  long accum     = 0;  //current accumulation
  int avgs[10]            = { 0,  0, 0, 0, 0, 0, 0, 0, 0, 0 };
} STNBAnalogSample;

typedef struct STNBAnalogReader_  {
  STNBAnalogClock    aClock; //reads coordinator
  STNBAnalogSample   samples[ENAnalogSampleType_Count];  //samples
} STNBAnalogReader;

//Buzzer

typedef struct STNBBuzzer_  {
  const int pin             = 52; //pin
  unsigned long lastActTime = 0;  //Last time a beep was made
  unsigned long waitAccum   = 0;  //Time accumulated  since last beep
} STNBBuzzer;

//Config

typedef struct STNBCfg_  {
  //------
  //System
  //------
  struct {
    //Arduino reference  voltage
    const float voltsRef = 5.0f; //(verify yours with a multimeter)
  } sys;
  //------
  //Voltage sensor
  //------
  struct {
    //Manual  divider
    struct {
      const float r1 = 33000.f; //ohms
      const  float r2 = 4700.f; //ohms
    } divider;
    //Pre-made module
    struct  {
      const float r1 = 30000.f; //ohms
      const float r2 =  7500.f; //ohms
    } module;
  } voltage;
  //------
  //Current sensor
  //------
  struct {
    //Pre-made module
    struct {
      //ACS712 ELC-05; +/-  5A; 185 mV/A
      //ACS712 ELC-20; +/- 20A; 100 mV/A
      //ACS712 ELC-30;  +/- 30A; 66 mV/A
      const float miliVoltsPerAmp = 100.f;
    } module;
  } current;
} STNBCfg;

//---------
//- Global objects
//---------

STNBAnalogReader  state;
STNBBuzzer buzzer;
STNBCfg cfg;

//---------
//- Methods forward  declaration
//---------

//Get the raw avg of all samples collected in  the avgs-circular-queue
int samplesAvg(const STNBAnalogSample* src);

//Get  the avg in voltage value collected from the voltage-sensor-module.
float samplesAvgAsVoltageFromSensor(const  STNBAnalogSample* src);

//Get the avg in voltage value collected from the  divider made with resistor.
float samplesAvgAsVoltageFromDivider(const STNBAnalogSample*  src);

//Get the avg in current (amps) value collected from the current-sensor-module
float  samplesAvgAsAmps(const STNBAnalogSample* src);

//---------
//- Setup
//---------

void  setup() {
  //Init serial
  {
    Serial.begin(9600);
    while (!Serial)  {
      ; // wait for serial port to connect. Needed for Native USB only
    }
  }
  //Turn off builtin-led
  {
    pinMode(LED_BUILTIN, OUTPUT);
    digitalWrite(LED_BUILTIN, LOW);
  }
  //Buzzer
  {
    pinMode(buzzer.pin,  OUTPUT);// set digital IO pin pattern, OUTPUT to be output 
    buzzer.lastActTime  = micros();
    buzzer.waitAccum = 0;
  }
  //Init analog reader
  {
    state.aClock.readLastTime  = micros();
    state.aClock.readWaitAccum = 0;
    state.aClock.readsCount    = 0;
    state.aClock.avgsCount     = 0;
    state.aClock.avgsIdxLast   = 0;
    {
      int i; for(i = 0; i < ENAnalogSampleType_Count; i++){
        STNBAnalogSample* ss = &state.samples[i];
        //Pin
        switch(i){
          case ENAnalogSampleType_BatteryV:
            ss->pin = A1;
            break;
          case ENAnalogSampleType_BatteryA:
            ss->pin = A2;
            break;
          case ENAnalogSampleType_PanelV:
            ss->pin = A3;
            break;
          case ENAnalogSampleType_PanelA:
            ss->pin = A4;
            break;
          default:
            //Error
            ss->pin = A0;
            break;
        }
        //Zeroes
        ss->accum = 0;
        {
          int  i; for(i = 0; i < (sizeof(ss->avgs) / sizeof(ss->avgs[0])); i++){
            ss->avgs[i]  = 0;
          }
        }
      }
    }
  }
}

//---------
//-  Loop
//---------

void loop() {
  unsigned long curTime = micros();
  //Tick for IR detection
  {
    STNBAnalogClock* coord = &state.aClock;
    //Accumulate time
    if(coord->readLastTime < curTime){
      coord->readWaitAccum  += curTime - coord->readLastTime;
    } else {
      coord->readWaitAccum  = (4294967295 - coord->readLastTime) + curTime;
    }
    //Do one-tick action
    {
      int i; for(i = 0; i < ENAnalogSampleType_Count; i++){
        STNBAnalogSample*  ss = &state.samples[i];
        const int val =  analogRead(ss->pin);
        ss->accum  += val;
      }
      coord->readsCount++;
    }
    //Process accumulated  events
    while(coord->readWaitAccum > 1000000){
      const int avgsArrSz  = (sizeof(state.samples[0].avgs) / sizeof(state.samples[0].avgs[0]));
      {
        //Move index
        if(coord->avgsCount != 0){
          coord->avgsIdxLast++;
          if(coord->avgsIdxLast == avgsArrSz){
            coord->avgsIdxLast  = 0;
          }
        }
        //Populate slots
        {
          if(coord->readsCount  > 0){
            int i; for(i = 0; i < ENAnalogSampleType_Count; i++){
              STNBAnalogSample*  ss = &state.samples[i];
              ss->avgs[coord->avgsIdxLast] = ss->accum  / coord->readsCount;
            }
          } else {
            int i;  for(i = 0; i < ENAnalogSampleType_Count; i++){
              STNBAnalogSample*  ss = &state.samples[i];
              ss->avgs[coord->avgsIdxLast] = 0;
            }
          }
        }
        //Increase count
        if(coord->avgsCount  < avgsArrSz){
          coord->avgsCount++;
        }
        //Calculate  avgs and print
        {
          if(coord->avgsIdxLast == avgsArrSz - 1){
            //Battery
            {
              const float avgV  = samplesAvgAsVoltageFromSensor(&state.samples[ENAnalogSampleType_BatteryV]);
              const float avgA  = samplesAvgAsAmps(&state.samples[ENAnalogSampleType_BatteryA]);
              Serial.print("Bat\	"); 
              Serial.print(avgV, 2);  Serial.print("\	v\	");
              Serial.print(avgA, 3); Serial.print("\	a\	");
            }
            //Panel
            {
              const float  avgV  = samplesAvgAsVoltageFromDivider(&state.samples[ENAnalogSampleType_PanelV]);
              const float avgA  = samplesAvgAsAmps(&state.samples[ENAnalogSampleType_PanelA]);
              Serial.print("Pnl\	"); 
              Serial.print(avgV, 2);  Serial.print("\	v\	");
              Serial.print(avgA, 3); Serial.print("\	a\	");
            }
            Serial.print("\
");
           }
        }
        //Reset counters
        {
          int i; for(i = 0; i < ENAnalogSampleType_Count;  i++){
            STNBAnalogSample* ss = &state.samples[i];
            ss->accum  = 0;
          }
        }
        coord->readsCount = 0;
      }
      coord->readWaitAccum -= 100000;
    }
    //Keep time
    coord->readLastTime  = curTime;
    //Beep and delay
    {
      //Accumulate time
      if(buzzer.lastActTime  < curTime){
        buzzer.waitAccum += curTime - buzzer.lastActTime;
      }  else {
        buzzer.waitAccum = (4294967295 - buzzer.lastActTime) + curTime;
      }
      buzzer.lastActTime = curTime;
      //
      if(buzzer.waitAccum  > 3000000){
        //Delay by beeing
        int i; for(i = 0;i < 10; i++){  // output a frequency sound
          digitalWrite(buzzer.pin, HIGH);// sound
          delay(1);
          digitalWrite(buzzer.pin, LOW);//not sound
          delay(1);
        }
        buzzer.waitAccum = 0;
      } else {
        //dealy  one tick next read
        delay(10);
      }
    }
  }
}

//Get  the raw avg of all samples collected in the avgs-circular-queue
int samplesAvg(const  STNBAnalogSample* src){
  int total = 0, count = 0, i;
  for(i = 0; i < (sizeof(src->avgs)  / sizeof(src->avgs[0])); i++){
    total += src->avgs[i];
    count++;
    break;
  }
  return total / count;
}

//Get the avg in voltage  value collected from the voltage-sensor-module.
float samplesAvgAsVoltageFromSensor(const  STNBAnalogSample* src){
  const float value = samplesAvg(src);
  const float  vout  = (value * cfg.sys.voltsRef) / 1024.0f;
  const float vin = vout / ( cfg.voltage.module.r2  / (cfg.voltage.module.r1 + cfg.voltage.module.r2) ); 
  return vin;
}

//Get  the avg in voltage value collected from the divider made with resistor.
float  samplesAvgAsVoltageFromDivider(const STNBAnalogSample* src){
  const float value  = samplesAvg(src);
  const float vout  = (value * cfg.sys.voltsRef) / 1024.0f;
  const float vin = vout / ( cfg.voltage.divider.r2 / (cfg.voltage.divider.r1 +  cfg.voltage.divider.r2) ); 
  return vin;
}

//Get the avg in current  (amps) value collected from the current-sensor-module
float samplesAvgAsAmps(const  STNBAnalogSample* src){
  const int adcValAbs     = samplesAvg(src); //From 0  to 1024
  const int adcValSign    = adcValAbs - (1024 / 2); //From -512 to 512
  const float adcValSignRel = (float)adcValSign / (float)(1024 / 2); //From -1.0f  to 1.0f
  const float adcMiliVolts = adcValSignRel * (cfg.sys.voltsRef * 1000.0f  / 2.0f);
  const float currentValue = adcMiliVolts /  cfg.current.module.miliVoltsPerAmp;
  return currentValue; //+ 0.1465; //adjustment
}

//------------
//End-of-program
//------------

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Monitoring solar street lamps voltage and current

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