3
votes
Accepted
Cannot compile code from Arduino WIFI shield example
Those kinds of errors are usually caused by the selection of an incorrect hardware in the IDE.
Choosing a correct board in the IDE will solve the compilation issue.
Since you said that you used the ...
- 1,515
3
votes
Accepted
Connecting Web Server in GoDaddy Hosting
I have a domain.
Congratulations.
It is hosted by GoDaddy.
You have my deepest sympathies.
I need to connect that server and receive some data by executing PHP files.
I am not sure about the ...
- 105k
3
votes
MD5 Password in Sketch
I use Tzapu's WiFiManager https://github.com/tzapu/WiFiManager.
That starts your ESP as a WiFi access point (AP mode) which presents a web page at http://192.168.4.1 where you enter your WiFi SSID ...
- 290
3
votes
Make OTA work with Arduino Uno Wifi
What Arduino board are they referencing in the guide linked above, that we can just connect to out of the box?
The first Uno WiFi was made in 2016 by arduino.org. It is retired and not available in ...
- 18.1k
3
votes
Accepted
'TCCR1B' was not declared in this scope
While writing this answer, I found out about the register emulation of the Arduino Uno Wifi. The Uno Wifi is a different chip, than the Uno, thus you have different registers. But the Uno Wifi was ...
- 16.3k
3
votes
Accepted
Setup loops: never enters loop - restarting?
You can tell that something is going wrong between your println. Some advice in this case: eliminate the String entirely and replace the println with a series of print. This would let you narrow down ...
- 144
2
votes
Accepted
MD5 Password in Sketch
Can I store an MD5 password hash instead
No. MD5 is a "trapdoor" algorithm. It's one-way. You can make a hash from a password but you cannot make a password from a hash.
You could AES encrypt it, ...
- 105k
2
votes
Arduino uno wifi rev2 stuck inside loop
/* hardware libraries*/
#include <Key.h>
#include <Keypad.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>
/*Wifi and request libraries*/
#include &...
- 161
2
votes
Accepted
Can I get around extremely long time to setup WIFI connection WPA2 Personal?
4 even 5 seconds is normal for connecting to WiFi. How long takes your phone or other devices to connect?
You can connect a little faster with static IP address.
EDIT: With WiFiNINA library for Uno ...
- 18.1k
2
votes
Selection of module for person following shopping cart
Bluetooth beacon. Use "bluetooth positioning arduino" as search terms.
Bluetooth beacon is a way to achieve the same as a GPS can do outdoor. By placing beacons around the room you can find ...
- 165
2
votes
Accepted
Monitor two baud rates
Your computer can not see what is going over the WiFiBoard serial connection because that connection has nothing at all to do with the connection to your computer.
If you want your computer to see ...
- 105k
2
votes
Accepted
Run function concurrent to server.available()
There is no “parallel” on a single core arduino. All you need to do is program both things in a non blocking fashion. Don’t use delay or while loops waiting on things and you can do both things so ...
- 3,270
2
votes
Send values from Arduino Uno to Wemos D1 R1
I agree with @Offer that using UART is the simplest solution to connect the devices.
I just want to suggest two alternatives:
Use an external analog to digital converter IC. Using the Arduino only ...
- 1,859
2
votes
Send values from Arduino Uno to Wemos D1 R1
As I see it, the most straight-forward way to connect 2 Arduinos is using their built-in UART (aka Serial port, TX/RX pins) communication.
There are many tutorials on this on Google, and a similar ...
- 107
2
votes
Problem with using PubSubClient, the "callback" function doesn't seem to work correctly
From the PubSubClient library documentation:
Internally, the client uses the same buffer for both inbound and outbound messages. After the callback function returns, or if a call to either publish or ...
- 1,008
1
vote
Accepted
Thermistor returns correct value on Arduino Nano, completely fails on Arduino Uno Wifi Rev 2?
The Arduino UNO WiFi Rev2 defaults to an internal analog reference of 0.55V where the classic (non-"Every") Nano defaults to the external VCC voltage as a reference, which is usually around ...
- 5,221
1
vote
Arduino recieve sensor data from other arduino SPI
Well had a bit of luck after spending all day on this.
Arduino UNO (sender): Like mentioned by chrisl, use Serial.write and not Serial.print
mySerial.write(sonar.ping_cm());
UNO Wifi (receiver):
...
- 121
1
vote
Arduino analog input to iphone notification
It is totally doable, but we cannot give detailed tutorials here, since this is a simple Q&A site. So I will point you to a direction, that can lead you to the solution.
When building IOT devices ...
- 16.3k
1
vote
Accepted
Arduino Wifi Rev2, bug when reading PWM duty cycle value on pin 6
Arguable bug location
The problem appears to be here in the analogWrite() code:
timer_B->CCMPH = val;
I suppose it could be argued that you're using the timer in an way unintended
by the ...
- 5,221
1
vote
Accepted
Run method every hour
An Arduino Uno doesn't have a Real Time Clock, but you could contact a NTP time server on the internet using the WiFi shield you mention, and get the time from there, and then keep track of time using ...
- 1,775
1
vote
Uno Wifi Rev2 Programming via Uno R3 ArduinoISP
The new generation of AVR chips created by Microchip no longer use the same ICSP protocol as the old ones. Instead they use a new protocol called updi.
You need to use a different sketch and wiring to ...
- 105k
1
vote
ESP8266 RF Calibration
You can't do anything else with the RF calibration then to clean the flash area where it is stored. There are two reason for doing it:
First is reason to delete the RF calibration area is, if it was ...
- 18.1k
1
vote
I'm getting an error while uploading my code to esp8266 via an arduino (FatalError('Failed to connect to %s: %s' % (self.CHIP_NAME, last_error)))
You need to set esp 8266 to flash mode.
Please connect en PIN to Gnd pin.
Then flash again.
- 11
1
vote
Can I get around extremely long time to setup WIFI connection WPA2 Personal?
For a proof-of-concept, use two Arduinos, one for WiFi and one for everything else.
The everything-else Arduino can keep your system responsive (minus the WiFi, of course, during connection time) and ...
- 15.3k
1
vote
Uno Wifi rev2 - after long time it disconnects
As you have not given the details there are some things to check
is your Nina-Firmware > 1.2.4
If not update to the latest 1.3.0 via the WiFi101-FirmwareUpdater-Plugin 0.10.10 is included in the ...
- 1,331
1
vote
Accepted
Solution needed for sending HTTPs requests from multiple Arduino units in the field
For secure TCP connection with WiFiNINA library use WiFiSSLClient instead of WiFiClient.
The Arduino firmware in the NINA ESP32 module has certificates of well known CA authorities so the server's ...
- 18.1k
1
vote
MD5 Password in Sketch
I laud your intention and wish there were a good solution on the ESP8266 for what you're trying to do.
MD5 is a one-way hash function, so you won't be able to simply recover the original string to ...
- 1,554
1
vote
Arduino uno wifi rev2 stuck inside loop
Although I can not verify my code, I tried to modify your program. Probably it does not compile and you have to do some corrections. I changed it in a way I would expect it to work and hopefully I ...
- 1,883
1
vote
Accepted
What is ECC608 crypto chip accelerator used for in Arduino Uno Wifi rev2?
The library for the chip is ArduinoECCX08. It is used by the ArduinoBearSSL library. The ArduinoBearSSL is used by the ArduinoIoTCloud
library and Arduino_OAuth library.
.
- 18.1k
1
vote
Accepted
strcat parameters throwing pointer errors in my tcp server / parser application
strcat is a function to concatenate strings. It expects a char array as second parameter. You have only a single char newChar to add to your string.
size_t l = strlen(inputs[i]);
inputs[i][l] = ...
- 18.1k
Only top scored, non community-wiki answers of a minimum length are eligible