ThingSpeak

关注

My partner has uploaded the DHT 22 sensor details in ThingSpeak,however from there we have no clue on how to retrieve those data into unity. i really hope someone could help me with this

My goal is to get the data from two DHT22 sensors, with a single sensor I had no problem but with two sensors I get only a few data and then it interrupts reporting "Read DHT22 failed." I share my code, any suggestions I appreciate #include <SimpleDHT.h> #include <ESP8266WiFi.h> String apiKey = "xxxxx"; const char* ssid = "xxxxx"; const char* password = "xxxxx"; const char* server = "api.thingspeak.com"; int pinDHT22 = D0; int pinDHT221 = D1; SimpleDHT22 dht22(pinDHT22); SimpleDHT22 dht221(pinDHT221); WiFiClient client; void setup() { Serial.begin(115200); delay(10); WiFi.begin(ssid, password); Serial.println(); Serial.println(); Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); } void loop() { byte temperatura = 0; byte humedad = 0; byte temperatura1 = 0; byte humedad1 = 0; if (dht22.read(pinDHT22, &temperatura, &humedad, NULL)) { Serial.print("Read DHT22 failed."); return; } if (dht221.read(pinDHT221, &temperatura1, &humedad1, NULL)) { Serial.print("Read DHT221 failed."); return; } if (client.connect(server,80)) { String postStr = apiKey; postStr +="&field1="; postStr += String((int)temperatura); postStr +="&field2="; postStr += String((int)humedad); postStr +="&field3="; postStr += String((int)temperatura1); postStr +="&field4="; postStr += String((int)humedad1); postStr += "\r\n\r\n"; client.print("POST /update HTTP/1.1\n"); client.print("Host: api.thingspeak.com\n"); client.print("Connection: close\n"); client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n"); client.print("Content-Type: application/x-www-form-urlencoded\n"); client.print("Content-Length: "); client.print(postStr.length()); client.print("\n\n"); client.print(postStr); Serial.println("% send to Thingspeak"); } client.stop(); Serial.println("Waiting…"); delay(120000); } Problem with two (or more) DHT22 sensors connected to nodeMCU problem solved! Thanks for letting us know! dht22

I am trying to write humidity and temperature data from DHT22 to thingspeak channel. I installed Arduino support package and additional library for DHT (FYI: I haven't set myself any directory when I install the package & library) Then I get the error message as below: C:/ProgramData/MATLAB/SupportPackages/R2019a/3P.instrset/arduinoide.instrset/idepkgs/tools/arm-none-eabi-gcc/4.8.3-2014q1/bin/arm-none-eabi-g++ -std=gnu++11 -fno-threadsafe-statics -fno-rtti -fno-exceptions -Os -c -g -w -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -Dprintf=iprintf -DARDUINO=10801 -MMD -MP -MF"MW_thingspeak.dep" -MT"MW_thingspeak.o" -MMD -mcpu=cortex-m0plus -fpermissive -DF_CPU=48000000L -DARDUINO_SAMD_MKR1000 -DARDUINO_ARCH_SAMD -D__SAMD21G18A__ -mthumb -DUSB_VID=0x2341 -DUSB_PID=0x824e -DUSBCON -DUSB_MANUFACTURER=\""Unknown\"" -DUSB_PRODUCT=\""Genuino MKR1000\"" -D_RUNONTARGETHARDWARE_BUILD_ -D_ROTH_MKR1000_ -D_RTT_THINGSPEAK_WIFI_=1 -D_RTT_USE_SERIAL0_ -DMODEL=dht22_iot_demo -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DMODEL_HAS_DYNAMICALLY_LOADED_SFCNS=0 -DON_TARGET_WAIT_FOR_START=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DTID01EQ=0 -DEXT_MODE=1 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=0 -DXCP_CUSTOM_PLATFORM -DEXIT_FAILURE=1 -DEXTMODE_DISABLEPRINTF -DEXTMODE_DISABLETESTING -DEXTMODE_DISABLE_ARGS_PROCESSING=1 -DSTACK_SIZE=64 -D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ -DRT -DMW_TIMERID=9 -DMW_PRESCALAR=256 -DMW_TIMERCOUNT=46875 -DMW_SCHEDULERCOUNTER=2 -D_RTT_BAUDRATE_SERIAL0_=9600 -D_RTT_BAUDRATE_SERIAL1_=9600 -D_RTT_ANALOG_REF_=0 -D_RTT_WIFI_Local_IP1=192 -D_RTT_WIFI_Local_IP2=168 -D_RTT_WIFI_Local_IP3=1 -D_RTT_WIFI_Local_IP4=20 -D_RTT_WIFI_SSID="Park1Suite0404" -D_RTT_WIFI_WPA_PASSWORD=jj12190516P -D_RTT_WIFI_WPA=1 -D_RTT_DISABLE_Wifi_DHCP_=0 -D_RTT_ThingSpeak_IP1=184 -D_RTT_ThingSpeak_IP2=106 -D_RTT_ThingSpeak_IP3=153 -D_RTT_ThingSpeak_IP4=149 -D_RTT_ThingSpeak_Port=80 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DEXT_MODE=1 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=0 -DTID01EQ=0 -DON_TARGET_WAIT_FOR_START=1 -DXCP_CUSTOM_PLATFORM -DEXIT_FAILURE=1 -DEXTMODE_DISABLEPRINTF -DEXTMODE_DISABLETESTING -DEXTMODE_DISABLE_ARGS_PROCESSING=1 -DSTACK_SIZE=64 -DRT -DMODEL=dht22_iot_demo -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DMODEL_HAS_DYNAMICALLY_LOADED_SFCNS=0 -IC:/Users/JOHNPA~1/DOCUME~1/MATLAB/DHT_v2 -IC:/PROGRA~3/MATLAB/SupportPackages/R2019a/toolbox/target/supportpackages/arduinobase/include -IC:/Users/JOHNPA~1/AppData/Roaming/MATHWO~1/MATLAB Add-Ons/Collections/Arduino Additional Sensors Library (DHT, LPS331)/roslovets-Arduino_Additional_Sensors_Simulink_Library_DHT_LPS331-7d4fe21/drivers/DHT/include -IC:/Users/JOHNPA~1/DOCUME~1/MATLAB/DHT_v2/dht22_iot_demo_ert_rtw -IC:/PROGRA~1/MATLAB/R2019a/extern/include -IC:/PROGRA~1/MATLAB/R2019a/simulink/include -IC:/PROGRA~1/MATLAB/R2019a/rtw/c/src -IC:/PROGRA~1/MATLAB/R2019a/rtw/c/src/ext_mode/common -IC:/PROGRA~1/MATLAB/R2019a/rtw/c/ert -IC:/PROGRA~1/MATLAB/R2019a/toolbox/coder/rtiostream/src -IC:/PROGRA~1/MATLAB/R2019a/toolbox/coder/rtiostream/src/utils -IC:/ProgramData/MATLAB/SupportPackages/R2019a/3P.instrset/arduinoide.instrset/idepkgs/packages/arduino/tools/CMSIS/4.5.0/CMSIS/Include -IC:/ProgramData/MATLAB/SupportPackages/R2019a/3P.instrset/arduinoide.instrset/idepkgs/packages/arduino/tools/CMSIS-Atmel/1.1.0/CMSIS/Device/ATMEL -IC:/ProgramData/MATLAB/SupportPackages/R2019a/3P.instrset/arduinoide.instrset/idepkgs/packages/arduino/hardware/samd/1.6.20/cores/arduino -IC:/ProgramData/MATLAB/SupportPackages/R2019a/3P.instrset/arduinoide.instrset/idepkgs/packages/arduino/hardware/samd/1.6.20/variants/mkr1000 -IC:/PROGRA~3/MATLAB/SupportPackages/R2019a/toolbox/target/supportpackages/arduinotarget/include -IC:/PROGRA~3/MATLAB/SupportPackages/R2019a/toolbox/target/supportpackages/arduinotarget/scheduler/include -IC:/PROGRA~3/MATLAB/SupportPackages/R2019a/toolbox/target/supportpackages/armcortexmbase/scheduler/include -IC:/PROGRA~3/MATLAB/SupportPackages/R2019a/toolbox/target/shared/externalmode_daemon/include -IC:/Users/JOHNPA~1/DOCUME~1/Arduino/libraries/WiFi101/src -IC:/Users/JOHNPA~1/DOCUME~1/Arduino/libraries/WiFi101/src/bsp/include -IC:/Users/JOHNPA~1/DOCUME~1/Arduino/libraries/WiFi101/src/bus_wrapper/include -IC:/Users/JOHNPA~1/DOCUME~1/Arduino/libraries/WiFi101/src/common/include -IC:/Users/JOHNPA~1/DOCUME~1/Arduino/libraries/WiFi101/src/driver/include -IC:/Users/JOHNPA~1/DOCUME~1/Arduino/libraries/WiFi101/src/driver/source -IC:/Users/JOHNPA~1/DOCUME~1/Arduino/libraries/WiFi101/src/socket/include -IC:/Users/JOHNPA~1/DOCUME~1/Arduino/libraries/WiFi101/src/socket/source -IC:/Users/JOHNPA~1/DOCUME~1/Arduino/libraries/WiFi101/src/spi_flash/include -IC:/PROGRA~3/MATLAB/SupportPackages/R2019a/3P.instrset/arduinoide.instrset/idepkgs/packages/arduino/hardware/samd/1.6.20/libraries/SPI -o MW_thingspeak.o C:/ProgramData/MATLAB/SupportPackages/R2019a/toolbox/target/supportpackages/arduinobase/src/MW_thingspeak.cpp arm-none-eabi-g++: error: Add-Ons/Collections/Arduino: No such file or directory arm-none-eabi-g++: error: Additional: No such file or directory arm-none-eabi-g++: error: Sensors: No such file or directory arm-none-eabi-g++: error: Library: No such file or directory arm-none-eabi-g++: error: (DHT,: No such file or directory arm-none-eabi-g++: error: LPS331)/roslovets-Arduino_Additional_Sensors_Simulink_Library_DHT_LPS331-7d4fe21/drivers/DHT/include: No such file or directory gmake: *** [MW_thingspeak.o] Error 1 The make command returned an error of 2 ### Build procedure for model: 'dht22_iot_demo' aborted due to an error. Error(s) encountered while building "dht22_iot_demo": ### Failed to generate all binary outputs. Please advise how to resolve it.