Issue running in two different tasks Wifi and I2C device

[explorian]

Hi,

I don't know if it is a bug, however I have this situation on ESP32-WROOM-32D.

In the setup function I start 2 separated tasks. One task manages the connection to WiFi network with the "Wifi.h" library, after the Wifi connection completed the task stay IDLE with a infinite loop of delays.
The other task manages the I2C sensor DHT22; it essentially init the sensor and query it in a infinite loop and print the temperatures in the Serial terminal. The libraries used are "#Adafruit_Sensor.h, DHT.h, DHT_U.h".

The problem in this configuration is I get a sensor reading failure after some random number of successful readings (meanly 8-10).

This problem doesn't occur if I perform the same Wifi connection and sensor reading in the same task. I also tried to bind the two tasks on different cores, but I have the same problem.

Anyone may help me to figure out what can be wrong?

Regards

[mikemoy]

Anyone may help me to figure out what can be wrong?

without posting your code, probably not.

[explorian]

Sure:

Code: [Select all] [Expand/Collapse]

1. #include <Arduino.h>
2. #include <WiFi.h>
3. #include <Adafruit_Sensor.h>
4. #include <DHT.h>
5. #include <DHT_U.h>
6.  
7. // DHT sensor configuration
8. #define DHTPIN 16     // Digital pin connected to the DHT sensor
9. #define DHTTYPE    DHT22     // DHT 22 (AM2302)
10.  
11. #define PRJ_DEFAULT_STACK_SIZE 8192
12.  
13. // wifi credentials
14. const char* ssid = "xxxxxxxxxxx";
15. const char* password = "yyyyyyyyyyyyyyyy";
16.  
17.  
18. void initWiFi() {
19.   WiFi.mode(WIFI_STA);
20.   WiFi.begin(ssid, password);
21.   Serial.print("Connecting to WiFi ..");
22.   while (WiFi.status() != WL_CONNECTED) {
23.     Serial.print('.');
24.     delay(1000);
25.   }
26.   Serial.println(WiFi.localIP());
27. }
28.  
29. void TaskInternetManager ( void * pvParameters ){
30.  
31.   Serial.print("Task TaskInternetManager running on core ");
32.   Serial.println(xPortGetCoreID());
33.  
34.   initWiFi();
35.  
36.   for(;;){
37.     Serial.println(WiFi.localIP());
38.     delay(10000);
39.   }
40. }
41.  
42.  
43.  
44.  
45. DHT_Unified dht(DHTPIN, DHTTYPE);
46. uint32_t delayMS;
47.  
48. void initSensorsManager() {
49.     dht.begin();
50.     // Print temperature sensor details.
51.     sensor_t sensor;
52.     dht.temperature().getSensor(&sensor);
53.     Serial.println(F("------------------------------------"));
54.     Serial.println(F("Temperature Sensor"));
55.     Serial.print  (F("Sensor Type: ")); Serial.println(sensor.name);
56.     Serial.print  (F("Driver Ver:  ")); Serial.println(sensor.version);
57.     Serial.print  (F("Unique ID:   ")); Serial.println(sensor.sensor_id);
58.     Serial.print  (F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("°C"));
59.     Serial.print  (F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("°C"));
60.     Serial.print  (F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("°C"));
61.     Serial.println(F("------------------------------------"));
62.     // Print humidity sensor details.
63.     dht.humidity().getSensor(&sensor);
64.     Serial.println(F("Humidity Sensor"));
65.     Serial.print  (F("Sensor Type: ")); Serial.println(sensor.name);
66.     Serial.print  (F("Driver Ver:  ")); Serial.println(sensor.version);
67.     Serial.print  (F("Unique ID:   ")); Serial.println(sensor.sensor_id);
68.     Serial.print  (F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("%"));
69.     Serial.print  (F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("%"));
70.     Serial.print  (F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("%"));
71.     Serial.println(F("------------------------------------"));
72.     // Set delay between sensor readings based on sensor details.
73.     delayMS = sensor.min_delay / 1000;
74. }
75.  
76.  
77. void sensorLoop() {
78.   // Delay between measurements.
79.   delay(delayMS);
80.   // Get temperature event and print its value.
81.   sensors_event_t event;
82.   dht.temperature().getEvent(&event);
83.   if (isnan(event.temperature)) {
84.     Serial.println(F("Error reading temperature!"));
85.   }
86.   else {
87.     Serial.print(F("Temperature: "));
88.     Serial.print(event.temperature);
89.     Serial.println(F("°C"));
90.   }
91.   // Get humidity event and print its value.
92.   dht.humidity().getEvent(&event);
93.   if (isnan(event.relative_humidity)) {
94.     Serial.println(F("Error reading humidity!"));
95.   }
96.   else {
97.     Serial.print(F("Humidity: "));
98.     Serial.print(event.relative_humidity);
99.     Serial.println(F("%"));
100.   }
101. }
102.  
103. void TaskSensorsManager ( void * pvParameters ){
104.   Serial.print("Task TaskSensorsManager running on core ");
105.   Serial.println(xPortGetCoreID());
106.   initSensorsManager();
107.  
108.   for(;;){
109.     sensorLoop();
110.   }
111. }
112.  
113.  
114.  
115.  
116. TaskHandle_t TaskInternetManagerHandle;
117. TaskHandle_t TaskSensorsManagerHandle;
118.  
119.  
120. void setup() {
121.   Serial.begin(115200);
122.  
123.   // Initialize device.
124.   Serial.println(F("HELLO WORLD"));
125.  
126.   xTaskCreatePinnedToCore( TaskInternetManager, "TaskInternetManager", PRJ_DEFAULT_STACK_SIZE, NULL, 1, &TaskInternetManagerHandle, 0);          /* pin task to core 0 */
127.   xTaskCreatePinnedToCore( TaskSensorsManager, "TaskSensorsManager", PRJ_DEFAULT_STACK_SIZE, NULL, 5, &TaskSensorsManagerHandle, 0);
128.  
129.   vTaskDelete(NULL);
130. }
131.  
132. void loop() {
133. }
134.  
135.  
136.  

GeSHi © Codebox Plus Extension

[/code]

[explorian]

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[explorian]

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[ESP_Sprite]

Just posting here to say that I don't see any obvious interference between the two... perhaps it's a problem in the dht driver not bein built for another task intercepting it? Possibly you could try running that task on a different core?