3
votes
Accepted
MKR1000 and DS18B20 temperature sensor
Looks like you have it wired wrong. A schematic would really help but it looks like you've got 5V going directly into the sensors data line (yellow wire) it's connected on your breadboard to the ...
- 583
3
votes
Accepted
How to use multiple SPI slaves in MKR1000 if it doesn't have Slave Select (SS/CS) pin?
The Arduino doesn't care what pin you use for SS since you just use digitalWrite() on it anyway. You use any pin you like for one slave, so you can use any other pin you like for another slave.
The ...
- 106k
2
votes
Accepted
WiFi101 Client HTTP POST fails after 3rd request
I tried changing the strings to char's, that didn't work.
Verified that it was closing connections with the server, check.
Was reading around and saw someone who tried a soft reset of the wifi client ...
- 141
2
votes
Accepted
Changing outputs infinitely for no reason
You had the following general problem:
The code you were using was configuring a pin into INPUT mode and reading the value on it. On this pin you conencted a button without extern pullup or pulldown ...
- 3,646
2
votes
How do I lower clock speed for MKR1000?
48 MHz is a multiple of 16MHz. Why not just adjust the timing code to account?
- 6,974
2
votes
Mkr1000 Wifi Configuration
I'll release a new WiFiManager_Generic_Lite, with functionality similar to WiFiManager_NINA_Lite, to provide support specifically to MKR1000 using WiFi101, as well as other generic boards (nRF52, SAMD,...
- 451
2
votes
Accepted
Camera on mkr1000 or nodemcu 0.9
There are a couple of levels of names in your question, so here are how they fit together:
ESP8266 - This is the bare chip found in the wide range of "esp8266"-based boards/modules/etc. The chip ...
- 6,974
2
votes
How to control MKR1000 from outside your local network
You now can try this UPnP_Generic library to do the auto-portforwarding for you without manually touching the router.
Many of us are manually port-forwarding in Internet Gateway Device (IGD, Router) ...
- 451
2
votes
Problem on Sending float number and multiple float numbers
Sending numerical values between systems is fraught with difficulty. Not only do you have to ensure that both ends agree on the size of the data (16 bit vs 32 bit ints, float vs double, etc) but that ...
- 106k
1
vote
Comparison of a string received from MQTT/Cloud/Arduino
As I read the comments, I see the project requirements are evolving. The 0 = Off command structure will severely limit what you can do, but it is a good starting point.
Regarding the first block of ...
- 2,531
1
vote
Accepted
MKR1000 - Connecting to Pubnub
It appears the tutorial is now outdated and the PubNum library does not need the changes described in the tutorial.
The PubNub library has an example titled PubNubWifi101 which shows the client type ...
- 6,974
1
vote
Asymmetric encryption on a Teensy?
Teensy4.1 has 55 digital IO (serial) pins at up to 200MHz. The USB port supports 480mbps, and ethernet is 10/100mbps. You're limited to 32 DMA channels, though (complicated but these are used to ...
- 23
1
vote
Arduino MKR 10100 control DC Motor
The TIP120 is a poor choice because of the approximate 10% - 14% voltage drop across it. Try the circuit with a logic level, low Rds MOSFET.
For a more in-depth answer, please see this answer: https:/...
- 2,531
1
vote
Accepted
Powering a MKR with regulated 3.3v
You don't really need your regulator. That board has a connection (X1) intended for directly connecting two AA batteries (according to the schematic).
However, if you want to keep it regulated at 3....
- 106k
1
vote
Can I send data from one MKR1000 to another MKR1000
I found a tutorial that explains exactly what Majenko and Juraj explained,
https://www.instructables.com/id/MKR1000-IoT-Clientserver-Communications/
the library code that the tutorial references is ...
- 13
1
vote
Accepted
Can I send data from one MKR1000 to another MKR1000
WiFiClient object wraps a TCP socket. A normal TCP socket is connected to IP address and port. WiFiServer starts a listening socket on a port. If server on listening socket is contacted by a remote ...
- 18.2k
1
vote
How to use more than 2 I2S microphones on MKR Zero?
By definition, the I2S bus only allows up to 2 channels to be transmitted at the same time. Here is a quote from the Details section of the Wikipedia's I2S page:
The word select clock lets the ...
- 7,470
1
vote
Is it possible to do an OTA update using a GitHub link
It may be possible if you can write your own bootloader, but it certainly won't be easy.
The normal way of doing OTA updates is to use a chip that has segmentable and remappable flash memory (such as ...
- 106k
1
vote
Accepted
Loops fail after ~5 minutes when making two API calls every 10 seconds using WiFi client
You keep calling new to allocate memory but you never free it. This is a memory leak and eventually you run out. Instead of constantly creating new arrays, why don't you make those global or static. ...
- 3,390
1
vote
How can I calculate approximate cycles per second from pulsed pin on Arduino MKR Zero?
The dependency on the clock speed is hidden in the implementation of the delay() function. It works with 'human readable' milliseconds.
Hertz is count of repeating in one second. One second has 1000 ...
- 18.2k
1
vote
Accepted
How can I calculate approximate cycles per second from pulsed pin on Arduino MKR Zero?
It is unclear exactly what you are trying to do, however the frequency generated by the code would be ~5Hz - corresponding to a period of 200mS
- 1,645
1
vote
Build an improved GSM antenna for arduino mkr gsm 1400
On one end of the MKR GSM 1400 is a U.FL antenna connector. To that you need to connect a U.FL To Female SMA Adaptor. That adaptor can then screw into an SMA GSM Antenna of your choice.
- 106k
1
vote
Use 5V SD-Adapter on 3.3V System
You can use the adapter because:
the adapter uses an AMS1117 to generate 3.3V to supply the SD card and the level shifter
the level shifter is a 74LVC125 which uses 3.3V and works with 3.3V (and ...
- 11
1
vote
Use 5V SD-Adapter on 3.3V System
Catalex Micro SD Card Adapter has built-in level converter in a form of 74LVC125A 3-state buffer. This buffer chip needs 1.65 to 3.6V voltage supply. The +5V from your Arduino is lowered to 3.3V by ...
- 472
1
vote
Use 5V SD-Adapter on 3.3V System
The SD card is a 3.3 V device. The 5 V module with SD card adapter steps down the voltage for powering the card and has logic level conversion for card's SPI pins.
If you want to connect SD card to a ...
- 18.2k
1
vote
Accepted
Parse UNIX-time from char[]
On 32 bit systems, uint32_t is usually the same as unsigned int and unsigned long. You should be able to parse the number using strtoul(), which is quite standard and returns an unsigned long.
- 44.3k
1
vote
Use SD-Card module in combination with MKR GSM 1400
You can free choose pins used by SPI master to select slaves, but if possible use the default expected by the library.
With MKR and other SAMD Arduino boards use the same default SPI slave select ...
- 18.2k
1
vote
Arduino MKR Zero problem with new UART comunication
When a library does not highlight, it might be that the library is not coded to be highlighted (see here).
If you installed the library yourself, you may have put it in the wrong path.
- 478
1
vote
SSID was not declared in this scope
A problem in the include file on the line previous could cause the following line to be misinterpreted. To test that try moving the ssid after the password and see if the error changes. Obviously make ...
- 11
1
vote
WiFiSSLClient will not connect to servers with LetsEncrypt certificates
The solution is to update the certificates the WIFI 101 Firmware Updater tool (in the Arduino IDE).
Install the FirmwareUpdater sketch, as described on the Arduino site.
Select Tools -> WiFi 101 ...
- 121
Only top scored, non community-wiki answers of a minimum length are eligible