I am using ESP32 to read a temperature sensor and I wont to send this reading to Arduino to act according to different reading
what should be the connection between the ESP32 and Aruido?
Should is not the appropriate word, I would suggest to use the UART (Serial.print() and Serial.read()).
Because the ESP has an operating voltage of 3.3V and Arduino 5V, you must use a level shifter.
Related
I want to program a simple Webserver with an ESP8266 but I want to connect the ESP8266 to an Arduino Mega. I want to connect a LED and a Sensor to the Arduino and control the LED and read the sensor data via the ESP8266 Webserver.
I am a beginner and dont want too complex solutions. It's just a simple school project.
For the Webpage I am sending just some HTML Code, I do not use Blynk or anything like that.
My question is how can I connect the ESP8266 to the Arduino and control it's pins?
There is a million ways to connect an ESP to an Arduino.
Without any shields or perihperals you can basically use any wired bus that does not require transceivers.
For example I2C or SPI.
With shields or peripherals you can use CAN, LIN, RS232, Ethernet, WIFI, Bluetooth, radio, optical and audio transmission... The list is endless.
You can of course read a sensor with the ESP so an Arduino Mega is not really necessary.
Micro and Leonardo have two serial ports, denoted by "Serial" and "Serial1."
I can use Serial1 through the RX and TX pins for my sensor, a TF Mini, and still get output to the Arduino IDE through the Serial connection via USB.
I would like to, instead send that output via Bluetooth, which also requires a serial connection. I have attempted Software Serialization solutions for the sensor, without success.
Is it possible to access both Serial and Serial1 connections through the pins?
The Serial port in the Arduino Leonardo is virtual, so there is no physical way to interact with it, you'll need to do bit banging in other GPIO pins to simulate this connection. By doing this, it will slow down your sketch if you are doing more complicate stuff. And if you add an extra connection via Serial1 port, will be worse.
I am trying to do a project based on arduino and Android in which I want to use ultrasonic sensors and Bluetooth module hc-05 . I want to detect any obstacle using ultrasonic and send it's distance to Android app using Bluetooth. I am completely new to arduino and have never used it before . How could I connect both the Bluetooth and ultrasonic sensor to arduino uno board without using breadboard? Is it possible to connect both of them without using breadboard and just the jumper wires?
You can connect the Bluetooth Module and Ultrasonic Sensor with jumper wires directly to the Arduino.
Depending upon the Ultrasonic Sensor you are interfacing, there must be a library or a sample code. You can tweak the code to get the distance in your desired format or variable.
As far as the Bluetooth is concerned, you can operate it at 3.3v or 5v depending upon the module you use. Most of the Bluetooth module support both 3.3v and 5v - as they have voltage regulators on their break out. I have used these and they work on 3.3v as well as 5v
For instance, check the Bluetooth HC - 05 Module in the below link :
http://www.amazon.in/Verve-VTA009-Bluetooth-Module-HC-05/dp/B00S15XTG8?tag=googinhydr18418-21&tag=googinkenshoo-21&ascsubtag=7a58e842-4c10-40bf-a48f-339edef372a7
For implementing the Bluetooth communication, prefer using the Software Serial. If you connect the Bluetooth HC 05's Rx and Tx to the Arduino's Hardware UART Pins, there can be unpredictable results. I have experienced that using HC05 with Software Serial is reliable. Additionally, you can use the Serial Monitor to debug your code at the same time. I mean, you can send the same data on Software Serial and the Serial port and check if things are as desired.
You can implement, the HC-05 Software Serial at 9600 baudrate. 9600 is the default baudrate on most HC 05 Modules.
For developing the Arduino code and testing it, you can use a terminal client like PuTTY on you computer. You need to establish a bluetooth connection between your computer and HC 05.
HC-05 runs at 3.3V, make sure you do level conversion from 5V to 3.3V using a zener diode. Or buy a level converter if you are new to electronics. If you don't, there is a good chance you will blow up the HC-05. If you could add a photo we can see if its already done on the Bluetooth module, then you need not worry about level conversion
HC-05 is basically a wireless serial port over bluetooh. On arduino create a software serial post using the library SoftwareSerial and send the sensor data to that serial port
There are libraries available for popular HC-SR04 ultrasonic sensor, if that is the sensor you are using.
For testing on android many app are availables like Bluetooh Terminal, you can receive the data sent from arduino.
Yes the whole project can be done without breadboard using connecting wires.
I'm just starting out some studies with XBee S2 and Arduino and I'm not sure if I'm doing what I actually planned.
My idea was to use just one Arduino with one XBee (Coordinator) that would receive the DHT11 data from just Router XBee (without another arduino to process the DHT data) and save the Coordinator temperature and humidity in a database.
Searching for some results I found out that XBee is unable to send DHT11 Sensor signal to another XBee ( thought I could send the DHT data through some router XBee Pin).
So do you guys have any ideas on how I could fix this? Because using another arduino into my Router XBee would be a waste of battery, losing the purpose of a sensor network right? Do you guys recommend me to change the sensor or what?
Besides I'm using Arduino Uno, Libellium XBee Shield, XBee S2 and of course DHT11.
Based on the DHT11 Adafruit page, I'd say you'll need an extra processor to read the data:
...and spits out a digital signal on the data pin (no analog input
pins needed). Its fairly simple to use, but requires careful timing to
grab data.
You may want to consider one of Digi's Programmable XBee products, which includes an additional 8-bit Freescale processor on the radio module, which you could program to read the DHT11 and relay its data to your coordinator. Certainly a less-expensive solution than having an Arduino make that conversion.
Or, switch to a humidity sensor with an analog output that doesn't require digital conversion. SparkFun has a Honeywell HIH-4030 Breakout board that looks appropriate.
If your goal is to just have a remote humidity sensor, one last option would be to purchase a standalone, battery-powered sensor from Digi. They have a light/temperature/humidity sensor (here's the datasheet) with an XBee inside that should be easy to interface to your Arduino. It's been designed to run efficiently on batteries for an extended period of time. My understanding is that it uses the analog inputs of the XBee to relay the sensor readings.
I have an Arduino 2560 and would like to send serial data to my PC. However, I am currently not using the Arduino Bootloader because I wanted to use a program that I wrote for an Atmega644 before (as far as I understood, one has to use the Arduino language when using the Bootloader?).
Does anyone know if what I am trying to do is possible with reasonable effort?
Connection to PC via 2560's serial0 does not depend on bootloader (if you plan connection when main program is running). You need 16u2 running to bridge 5V serial UART to USB or you can of course use any other option (e.g. MAX232 or so) to convert 5V UART to USB or RS232. But in case of RS232 double check baud rate error because of 16MHz crystal for particular baudrate.
2560 bootloader just implements firmware flash.