When I run this code, I only get a high temperature as shown in the following picture.
How do I connect the pins to work properly?
A0-SIM
A1-RST
Can you explain it this way?
#include <Wire.h>
#include <Adafruit_MLX90614.h>
Adafruit_MLX90614 mlx = Adafruit_MLX90614();
void setup() {
Serial.begin(9600);
Serial.println("Adafruit MLX90614 test");
mlx.begin();
}
void loop() {
Serial.print("Ambient = "); Serial.print(mlx.readAmbientTempC());
Serial.print("*C\tObject = "); Serial.print(mlx.readObjectTempC()); Serial.println("*C");
Serial.print("Ambient = "); Serial.print(mlx.readAmbientTempF());
Serial.print("*F\tObject = "); Serial.print(mlx.readObjectTempF()); Serial.println("*F");
Serial.println();
delay(500);
Your sensor is using Serial communication interface, while Adafruit library is using I2C interface. So you can't use that library.
You need to connect Tx to Pin 10 on Arduino Uno, and Rx to Pin 11, and run the sketch shows here.
The Adafruit library is for a bare sensor or sensor module with an I2C connection, but the module you have uses a serial connection.
If you want to use the Adafruit library as-is, you need to get a module or sensor that can connect over I2C (one that has pins marked SCL/SDA).
If you want to use the module you have, you need to find an Arduino library that supports it (I don't know of one), or do some programming yourself.
Related
I am trying to send some data using the sim800l module.
I am using the SoftwareSerial library and connected the RX and TX pins to Digital pins 10 and 11. I have also tried pins 2 and 3.
The module is connected to a 5v power supply and the only pins connected to the Arduino board are RX and TX.
The module is connected to the network.
this is the code I am using:
#include <SoftwareSerial.h>
SoftwareSerial myGsm(10,11);
void setup()
{
myGsm.begin(9600);
Serial.begin(9600);
delay(500);
myGsm.println("AT+CGATT=1");
delay(200);
printSerialData();
myGsm.println("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"");//setting the SAPBR,connection type is GPRS
delay(1000);
printSerialData();
myGsm.println("AT+SAPBR=3,1,\"APN\",\"\"");//setting the APN,2nd parameter empty works for all networks
delay(5000);
printSerialData();
The problem is that nothing gets printed in the serial monitor.
I used the module to send sms messages using the FONA library and it worked.
Please help!
I think the problem is,
To print something on the serial monitor, you need to use the Serial.println();
The softwareSerial println only sends data to the devices connected to that pins.
I am trying to get my SIM800C to talk with my Arduino. There is no communication happening, though.
#include <SoftwareSerial.h>
SoftwareSerial at(2, 3);
void setup() {
Serial.begin(9600);
at.begin(9600);
}
void loop() {
// try every 2 seconds
delay(2000);
Serial.println("sending AT ... ");
at.println("AT");
while (at.available() > 0) {
Serial.write(at.read());
}
}
I am not able to get an OK back. SIM800C is supposed to detect the baud rate by itself.
I am sure there has to be a simple stupid mistake. I just don't know what to do at this point. I obviously already checked for cable break. Out of desperation I already tried to switch RX and TX. I also tried different baud rates (whatever is within the usual limitations of SoftwareSerial) but it should automatically detect it once a couple of AT commands got in anyway.
Weird enough, the pin PWX on the SIM800C needs to be hooked up to a GND to work. It started blinking every second now and is responding to AT commands.
Also it turned out that this specific module does not ship with autobauding enabled, as stated by the SIM800C documentation. The correct baud rate is 115200.
There are some problems you need to consider:
Use below sample code which transfers data between PC and SIM. Sometimes SIM module would go into power down state and won't respond on any AT command but would print some results in the serial monitor.
As already mentioned in comments it seems that your wiring is wrong and as you declared Software Serial as SoftwareSerial at(2, 3); which means pin 2 is Rx on Arduino and should connect to Tx pin of SIM and pin 3 is Tx on Arduino and should connect to Rx pin of SIM. Please don't mess with the pins and connect the pins like below correctly.
Arduino SIM
Rx 2 ----> Tx
Tx 3 ----> Rx
I'm not sure if you can power on SIM800 with a 500mA USB connector, make sure that use an external 1/2 A power supply for VCC of SIM module.
Look at the blink speed of SIM module if it connected and powered on it would blinky with 3 seconds delay and if it blinks fast, it means that it is being restarted. Also if SIM powered on correctly it would print some info like SIM READY, CALL READY, etc.
Try other baud rates like 115200 and see if you get anything on power on.
I put some macro definition to make pin mappings more clear.
#include <SoftwareSerial.h>
//SIM800 TX is connected to Arduino D2
#define SIM800_TX_PIN 2
//SIM800 RX is connected to Arduino D3
#define SIM800_RX_PIN 3
//Create software serial object to communicate with SIM800
SoftwareSerial serialSIM800(SIM800_TX_PIN,SIM800_RX_PIN);
void setup() {
//Begin serial comunication with Arduino and Arduino IDE (Serial Monitor)
Serial.begin(9600);
while(!Serial);
//Being serial communication witj Arduino and SIM800
serialSIM800.begin(9600);
delay(1000);
Serial.println("Setup Complete!");
}
void loop() {
//Read SIM800 output (if available) and print it in Arduino IDE Serial Monitor
if(serialSIM800.available()){
Serial.write(serialSIM800.read());
}
//Read Arduino IDE Serial Monitor inputs (if available) and send them to SIM800
if(Serial.available()){
serialSIM800.write(Serial.read());
}
}
Yes this module will not work in this configuration. There is a pin of V_TTL With 5V pin.. This pin enables the TTL logic converter of your GSM.. You have to connect this pin to 5V in case of arduino and to 3V in case of ESP8266.See the pin configuration here
I am trying to send data to an Arduino via a HM-10 module(BLE) from a MacOS device and am following this guide. For my wiring, I have done the following: I have the RX pin on the HM-10 hooked to the TX on the Arduino; the TX pin on the HM-10 to the RX on the Arduino; the VCC on the HM-10 to the 3.3V on the Arduino; the GND on the HM-10 to the GND on the Arduino.
I am using the following code:
#include <SoftwareSerial.h>
SoftwareSerial BTSerial(0, 1); //RX|TX
void setup(){
Serial.begin(9600);
BTSerial.begin(9600); // default baud rate
Serial.println("AT commands: ");
}
void loop(){
//Read from the HM-10 and print in Serial Moniter
if(BTSerial.available()) {
Serial.write(BTSerial.read());
}
//Read from the Serial Moniter and print to the HM-10
if(Serial.available()) {
BTSerial.write(Serial.read());
}
}
When I send AT+NAME?, I should be receiving OK+NAME:HMSoft, but I keep on getting a string of odd characters: AV⸮5⸮. In addition, none of the commands seem to have any effect.
What am I doing wrong that I am unable to interact with the HM-10 from my computer?
SoftwareSerial BTSerial(0, 1); //RX|TX
You are using hardware serial pins for software serial. And you are then using both, which corrupts the data.
Move the software serial pins to different ones, like 2 and 3.
After changing the pins to 2 and 3, choose Both NL&CR option to send commands to Arduino through the IDE. Otherwise it's not going to work.
I have an Arduino Mega 2560.
I want to connect it to ESP8266 aka ESP 01 module.
First i open and compile an empty sketch. When i start serial monitor, i write AT commands (like connect with WIFI) in serial monitor and i click on send button. In this case all works fine.
After I tested that the commands works properly , I want to write an Arduino sketch in which I implement the function to automatically send command without writing it in serial monitor.
For this purpose, i write this code:
#define SSID "test"
#define PASS "1111"
void connectWiFi() {
Serial.write(“AT+CWJAP=\"SSID\",\"PASS\"");
}
void setup() {
Serial.begin(9600);
connectWiFi();
}
void loop() {
}
When i try to execute the code in Serial monitor, it is printed only the string but the command does not work.
Why when i write this command in serial monitor works and when i try the code above, the command does not work?
Is there a way to pass and execute a command from arduino sketch? What is the problem in my code if is wrong?
Thanks in advance for response.
Sorry for my English.
Serial.write(...) makes arduino write through its serial ports (i.e. USB or pins 0 and 1). A better way to make Arduino send instructions directly to ESP is by defining "software serial" pins to communicate with ESP.
You'll need to include SoftwareSerial.h and use SoftwareSerial esp8266(2,3); for example to make pins 2 and 3 communicate serially with ESP.
Your code should look something like this:
#include <SoftwareSerial.h>
#define SSID "test"
#define PASS "1111"
SoftwareSerial esp8266(2,3);
void setup(){
Serial.begin(9600);
esp8266.begin(9600); //ensure this baudrate is similar to your ESP's
delay(500); //give it some time
esp8266.println(“AT+CWJAP=\"SSID\",\"PASS\""); //send to ESP this way
}
void loop(){
if(esp8266.available()){
while(esp8266.available()){
Serial.write(esp8266.read()); //make serial monitor print what ESP sends
}
}
}
You can also refer to this example for further detail
I'm working in project involving Arduino, Bluetooth and Android. My Arduino hardware will collect data from sensors and send them to an Android tablet via Bluetooth. My application on Android seems to work well when I tested it with BlueChat; it successfully receives data from BlueChat. Following is my code for my Arduino hardware. I'm quite sure I initiate HC-05 correctly. Can anyone look at my code and suggest whether it works if my idea is to collect reading from a temperature sensor at Analog pin 0, then transmit them to Digital pin 11, which is the Tx pin on Arduino connecting to Rx pin of Hc-05?
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11);
int tempPin=0;
void setup()
{
Serial.begin(9600);
mySerial.begin(9600);
}
void loop()
{
float reading = analogRead(tempPin); // reading on tempPin
float voltage = reading*5.0/1024.0; // the resolution of a pin is 10 bit,
float tempC = voltage/0.01; // 10mV = 1 Celcius
mySerial.write(tempC);
delay(3000);
}
I should mention that I power my Arduino Uno externally by an 9V battery.
Steps to try in this case:
- Send anything via HC-05 (hello world) -> this will exclude connection problems (might be a good idea to put HC-05 on the "real" serial and the debug messages on the 'soft' serial)
Test analog read part of the code via Serial Monitor: you can see if you get reasonable data
Test the combination of sensor reading and sending via HC-05
I don't think SoftwareSerial has a write( float ) method. I suggest you report back the raw data and let your app do the conversion. Don't forget delimiters, so you know when one number ends and the next starts:
void loop()
{
int reading = analogRead(tempPin); // reading on tempPin
mySerial.println( tempC, DEC );
delay(3000);
}