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Questions tagged [softwareserial]

A library for emulating UART functionality in software on any available digital IO pins. Use this tag for questions regarding SoftwareSerial.

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1answer
69 views

Not able to control digital pins using commands sent via HC-05 module

I am trying to control the LED on pin13 using the below code but it's not working. With this code I am able to print to the Serial Monitor but the code has no effect on the any of the digital pins. I ...
3
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1answer
111 views

Accelerometer (I2C) and Fona Shield (software serial) won't work together

I am using a Fona 808 shield with an Arduino Uno and the LSM303 accelerometer. The accelerometer is connected via I2C and the Fona uses software serial. My project requires the accelerometer to be ...
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1answer
30 views

How to use 2 serial port when WifiEsp library uses one of both

I try without success to receive datas from DataPort and transmit them to my computer via WifiPort, using ESP8266 wifi module. Each second, serial datas income on DataPort from another device. ...
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0answers
38 views

Send data string from Arduino UNO to ESP8266-01

Is there anyway to send a string from an Arduino UNO to a ESP8266-01 (one with only 8 pins RX, TX, CH-PD, vcc, ground, reset, GPIO0, GPIO2) without using without using AT commands. I've looked ...
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1answer
30 views

Send Multiple Value from Arduino uno to nodeMCU using serial [on hold]

I want to send 7 sensor data from Arduino uno to nodeMCU. But using serial I can send only one. How to send all 7 at the same time with time sync between the both devices.
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0answers
16 views

SoftwareSerial HC-05, ASCII “T” to turn on LED, doesn't work [duplicate]

Arduino Uno / HC-05 / ArduinoIDE App on my phone: "Bluetooth Terminal HC-05" I want the program to turn on the native 13th pin LED ON, if incoming text is "T" and turn it OFF if incoming text is "F". ...
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0answers
25 views

Reading incoming/outgoing bytes from SIM card / ATR

I am trying to read data from a two-way I/O uart pin of a sim card on Arduino. It is attached to the GPRS Arduino shield (with SIM900 modem). I believe I have a baud rate issue. I am supposed to ...
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1answer
36 views

Is it possible to have two serialEvent() in Arduino code?

I am developing a code on Arduino and need to implement a condition that if data is available form "serial2" then only get the input for "Serial" terminal of Arduino. I have tried with below code, ...
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1answer
18 views

SIM800l doesn't respond on arduino micro

I want my Arduino Micro to interact with my SIM 800 L module. But unfortunately nothing happens, may you can help me figure out where I made a mistake. Here's my wiring: Summary of my wiring: ...
0
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1answer
14 views

Using Arduino Mega with multiple HC05 Modules as masters, communicating to multiple HC05 Modules as slaves, each connected to separate Arduino

So I have not actually experimented with the HC05 Bluetooth Module yet, but I have read up about it and watched some videos. From what I understand, you cannot use one module (master) to communicate ...
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0answers
10 views

ZS-040 Bluetooth module is undiscoverable

My bluetooth module is connected to arduino nano using voltage delimiter (to get 3.3V) exactly as its said in this article. I connected it to my phone and was able to communicate with it through ...
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1answer
358 views

Bluetooth OBD2 ELM327 connectivity issues

I made a little project using an Arduino UNO, a 3.5" display, a HC-05 bluetooth module and an ELM327 (cheap ebay clone). I managed to establish communication, read the data, interpret and display it, ...
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0answers
22 views

Serial Communication between ESP-01 and arduino [duplicate]

I want to send sensor data from arduino to esp-01 and it further goes to firebase. And also wanted to send status of water pump from firebase back to the arduino to control motor manually. So what pin ...
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0answers
27 views

Using 2 serial ports on NodeMCU

I am using a NodeMCU ESP 12E board which will be programmed using the Arduino IDE. I intend to use it to send GPS data to the Blynk app server. I also want to interface a Bluetooth module HC-05 to the ...
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0answers
32 views

Arduino serial read data conversion, getting garbage values

I am developing code on Arduino to read 9 bytes of data from other controller. I am getting same arrya elements which is transmitted from controller, but when I convert the same it gives me garbage ...
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0answers
49 views

RS485 Serial Communication not working with Arduino

I am trying to control 2 devices with my arduino using RS485 communication. Basically switch on device 1 for 5 seconds when I send 'g' to the master. And switch on device 2 for e3 seconds when I send ...
0
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1answer
2k views

SoftwareSerial data not available

Second time I'm asking the same question with no solution, let me elaborate in other way for clarity. I wrote an Arduino program which uses two serial ports, one is hardware serial port and other is ...
0
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1answer
254 views

Passing HardwareSerial and SoftwareSerial as a Class Property

I wish to know if there is a way to use a single property Serial0 to hold a HardwareSerial or a SoftwareSerial or other class instances supporting basic methods such as available(), read() and write(),...
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2answers
5k views

SIM800L not registering to network

I am using SIM800L module. I am new to GSM modules. I have searched in many web sites about SIM800L, every where they mentioned baud rate 9600 for SoftwareSerial but it is not working at all in my ...
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1answer
35 views

Problems with serial communication from Arduino to ESP8266

I've been trying to get an Arduino and ESP8266 to communicate with each other over serial. The ESP8266 uses the Serial class for communications, while the Arduino uses SoftwareSerial. The problem is ...
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0answers
32 views

RS485 Arduino Communication Issue

Friends, I am trying to achieve half duplex communication between two Arduinos using RS485 Protocol. The hardware I am using is a MAX485 module and an Arduino Uno. I am using the SoftwareSerial ...
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3answers
1k views

Arduino Problem with using SoftwareSerial and SPI

I am using an external ADC (via SPI) and also a GPS receiver (Software Serial). I tried each one of them and it's working fine. Now, when I try to integrate both of them in one sketch, I can only make ...
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0answers
40 views

SerializeJson not working when using softserial

IDE:1.8.8 Board:Arduino UNO When I use the code below, I get result of print like this. { "result": [ { "ID": "01", "Value": [ "2", "1", "13" ] } ] } But when I use SoftwareSerial and in the setup ...
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0answers
25 views

Problem: char string not working with SoftwareSerial.h

I am creating a program to display text on an OLED display and then have it sent to a thermal printer. The issue is my second char string: word_buffer When I try to use word_buffer for any reason it ...
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0answers
35 views

Is it possible to make an HTTP get request using AT Commands without knowing the IP address of the web server?

I have the following code that can read a web page using HTTP get but I can only do it because the website I am doing it to has a static IP address, but in my project I am just hosting it on a free ...
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1answer
186 views

How to chose softserial library use on Arduino project?

I want to do a project that has multiple Arduino communication through UART, that project project one of limit is using Arduino Nano (small and cheap). I need to set 4 serial port instance on Nano to ...
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0answers
42 views

Arduino ESP8266 ESP-01S GET command

Looking for some help on this please. It is a little long winded, but the point of it is I cannot retrieve a string response via my ESP8266 ESP-01S. I connect my ESP to my Ardiuno using ...
0
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1answer
775 views

Did not find fingerprint sensor :( Arduino Mega 2560 Adafruit Fingerprint Sensor

I'm getting the following error when I try to enroll fingerprints using the Arduino Mega 2560 microcontroller along with a Fingerprint Scanner: Did not find fingerprint sensor :( The exact devices ...
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2answers
60 views

Several Software Serial Ports

I am planning to use an Arduino (Nano ideally, or Other) to send and receive information from several software serial ports to other arduinos, over their available pins, ideally 8 ports. I could ...
1
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2answers
87 views

Two serials can't work on the same speed

I have a device which sits on pins 10/11 of Arduino UNO. I am trying to send commands from my PC using Arduino to relay my commands to the device via Serial. The problem is that if I use speed 9600 ...
1
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1answer
50 views

Why my serial message won't show on another when I try use 2 Arduino communication

I am trying to make a simple chatting program with my 2 arduino uno and 2 PC. But when I tried write a message using PC1 serial monitor the message won't show up on PC2 serial monitor. I can't see the ...
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1answer
48 views

Measure Sofware Serial write() time

As you probably know, SoftwareSerial uses Interrupts to do some of the timing stuff of the Serial communication. What I am trying to accomplish is to measure the time that it takes SoftwareSerial....
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2answers
728 views

Arduino reads hc-05 device connecting status

Hello I want to get an arduino get status of bluetooth hc 05 if connect with device or not . I'm trying by myself and search on internet website but I can't find useful things.
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0answers
30 views

Using Arduino as ISP and SoftwareSerial at the same time

I'm trying to use my Arduino Uno as an ISP to program an ATTiny85 and at the same time check my board by using the SoftwareSerial library to output the values I'm getting from my sensor. Is this ...
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1answer
32 views

ESP-8266 stopped working due to possibly faulty perfboard layout

I have been following this tutorial to set up my ESP8266. I have also recreated on a perfboard the circuit provided in the tutorial, and I intend to use this perfboard circuit in my project. The ...
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1answer
97 views

vk2828u7g5lf GPS module over SoftwareSerial

So my goal was simple. Trying to get a GPS speed, and show it on a display (later use it to control a stepper motor). I am using the vk2828u7g5lf GPS module from Banggood, which after days of ...
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0answers
28 views

Making a ATMega328P-PU and computer communicate but not by standard serial communication

So i have been trying to make a ATMega328P-PU using the Arduino bootloader and a computer communicate the same way brands like Logitech and Razer makes their mouse's and keyboard's communicate with ...
1
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1answer
771 views

Sending PUBX commands to GPS Board (Ublox NEO-6M) through SoftwareSerial

I am having trouble parsing NMEA sentences coming from a GY-NEO6MV2 board (https://www.cytron.io/p-gps-neo6mv2), using the TinyGPS (https://github.com/mikalhart/TinyGPS) library. The GPS board itself ...
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2answers
260 views

Need Basic Help with Software Serial

I am testing the basic Software Serial example on the arduino website, but I cant get the myserial to print #include <SoftwareSerial.h> SoftwareSerial mySerial(10, 11); // RX, TX void setup() ...
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2answers
474 views

Can't get software serial to work

So I have two Arduinos (Arduino Nano) and I'm trying to get them to communicate via SoftwareSerial. I have the 'sending' Arduino's D10 pin connected to the 'recieving' Arduino's D11 pin, and vice ...
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1answer
53 views

ESP8266 SoftwareSerial not receiving any character

I want to use a ESP8266 (ESP12) to receive data from a counter at 9600 baud via SotwareSerial. But my program does not receive any data. I broke it down to the code i attach here. I tried it using ...
2
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1answer
1k views

Laser emitter + receiver for Arduino (Arduino to Arduino communication)

I'm working on a project using 2 Arduinos connected to 2 computers to demo Serial to Serial communication. We're using Arduino Uno connected to the computer via Serial and software serial for inter-...
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2answers
697 views

How will Arduino communicate wirelessly through XBee?

I am using one XBee S2 configured as coordinator API attached to my laptop and one XBee S2 attached to an Arduino Uno that is configured as a router AT. I want to generate an alarm on LabVIEW as I ...
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2answers
58 views

Software serial conflict with WiFi on ESP8266

I'm trying to use an ESP8266 (Wemos D1 mini) to read from a 19.2K serial port and report the results over WiFi. Programming is via Arduino IDE. The code to read the port works just fine if WiFi is not ...
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2answers
584 views

how to make GPRS/GSM SIM900 shield work with gps neo-6M module using Arduino UNO board

I'm a beginer to arduino program.i will like to make a program that will send latitude and longitude on my mysql database.so since 3 days i try to learn how to use all this material(GPRS/GSM SIM900 ...
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1answer
82 views

My Arduino freezes if power removed from the HMI

I have an Arduino (Pro Mini) connected to an HMI display over serial. When the user pushes a button on the HMI screen, it activates a relay attached to one of the digital pins on the Arduino. For ...
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1answer
236 views

Cannot receive data from GPS SD Shield V2-B

I am attempting to receive GPS data from a GPS SD Shield V2-B purchased from maplin. I have attempted the very simple sketch they provide on their website linksprite.com. I have also tried following a ...
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1answer
558 views

How to communicate with GPS SIM900a without Serial Monitor

I am fairly new to Arduino. I was working on a project where I use a GSM SIM900a modem interfaced with an Arduino. The AT commands are sent via the Arduino to the GSM Modem. The problem, however, is ...
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1answer
73 views

Can't send SoftwareSerial to Class Object

I have a problem when I try to use SoftwareSerial in a class.. Here my detail My class class MyEsp8266 { protected: SoftwareSerial *esp8266; public: MyEsp8266(SoftwareSerial *...
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3answers
416 views

Garbled serial from GPS device

I'm using an Arduino Uno. "Regular" serial is plugged into my computer, and I can receive just fine. I'm using AltSoftSerial (tried SoftwareSerial, same results) with RX and TX on pins 8 and 9 to ...