Questions tagged [mkr-gsm-1400]

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How to update root certificate(s) on Arduino MKR GSM 1400 (SARA-U201 basically) in order to be able to connect to GCP MQTT?

I wish to upload measurement data to Google Cloud Platform IoT Core with Arduino MKR GSM 1400. I have followed: https://docs.arduino.cc/tutorials/mkr-gsm-1400/securely-connecting-a-mkr-gsm-1400-to-...
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Low power microcontroller with gprs/gsm and maybe gps on board

Good day to ya all. I have a general question and a potential problem to solve. My plan is to make a device which will work on 2 li-ion batteries. The purpose of this board is to take data from 3/4 ...
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Arduino crashing during serial print

I am trying to determine why my Arduino MKR NB 1500 code keeps crashing when the serial monitor is open and I look for data. I removed the string functions to prevent it from causing memory ...
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Power Arduino MKR GSM 1400 via VIN

I am working on a project with Arduino MKR 1400 GSM and I would like to power the arduino board using an external power source (https://www.reichelt.de/raspberry-pi-netzteil-5-1-v-3-0-a-usb-type-c-eu-...
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How to send AT commands to the ubox modem on MKR NB 1500

I am trying to send AT commands to the modem to keep the modem always active. I tried the File > Examples > MKRNB > Tools > SerialSarapassThrough example, but that gave me a +CME ERROR: ...
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MKR1400-how do I troubleshoot a POST request?

I'm successfully sending a GET request (in the setup function, to load certificates,) but my POST request fails with a bunch of AT errors. I suspect this has to do with the way I'm formatting the POST....
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Arduino MKR GSM 1400: Can I tell from code if the power has tripped

Is there a way to tell if an Arduino MKR GSM 1400 has lost power and has to rely on the connected battery? Ideally, I'd like to do this without adding additional circuitry. Alternatively, can I ...
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Triggering a Sleep Wake-up Event using analog output from a triple axis accelerometer?

I am working on a project that uses a Arduino MKR GSM 1400 and a ADXL335 Accelerometer . I am having trouble setting a interrupt wake up event on one of the GSM's interrupt-capable pin due to the ...
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half duplex for Atmel SAMD21

I'm using Arduino MKR GSM 1400. I know this board uses Atmel SAMD21 and SAMD21 support half duplex (USART with full-duplex and single-wire half-duplex configuration). My question is, How Can I ...
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Arduino MKR QoS 1 logging with ArduinoMqttClient

I am collecting data with Arduino MKR GSM 1400 and sending data to Azure Cloud (IOT HUB). Currently I use ArduinoMqttClient ArduinoMqttClient My question is, how to ensure both parties accepted QoS1 ?...
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MKR GSM 1400 Works only when connected to computer

My MKR GSM 1400 works fine when connected to a computer (powered USB) and after opening a serial connection to it. It does not when I plug it into a power supply. My power supply is a 5V 3A with a ...
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Arduino MKR GSM 1400 SSL client example fails to connect

I am using the GsmSSLWebClient example which comes with the MKRGSM library. The original example works just fine, I get the arduino ascii logo. But when I change the URL the arduino doesn't get any ...
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Multiple definition error when linking firmware.elf

I just can't wrap my head around on how to properly work with multiple files. My code has been getting quite big so I decided to split all the classes into one file each. So I'm left with 6 files: ...
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