nrf9160 current measurement with different data payloads

[MariusB]

Hi,

I want to do this with nrf9160: 

Transmit data (JSON strings) from the nrf9160 to some receiving end, and measure current profile for different amounts of data. It does not really matter what receives the data, e.g nrf cloud should work fine. 

Is there a sample project that can be used for this? I want to have a simple solution as possible. I found the nrf9160 Azure IoT hub, but I was hoping to have a soultion without setting up cloud configuration. 

[Didrik Rokhaug]

Hi,

First, we have an online power estimator: https://devzone.nordicsemi.com/nordic/power/w/opp/3/online-power-profiler-for-lte

Its estimates are based on measurements from the UDP sample: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/nrf9160/udp/README.html

We do not have a similar sample for TCP, bu the https_client might be a good starting point: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/nrf9160/https_client/README.html

Most clouds also use MQTT, so the mqtt_simple sample is also worth looking at: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/nrf9160/mqtt_simple/README.html

You can use it together with one of the open MQTT brokers to avoid having to set up a server or cloud solution yourself.

Best regards,

Didrik

[MariusB]

Hi,

Thanks, this was great information. However, as far as I understand, PSM is disabled in these samples? I found the sample called Cloud Client:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/nrf9160/cloud_client/README.html 

This sample does not seem to disable PSM. 

[Didrik Rokhaug]

The UDP sample can easily be configured to use UDP: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/nrf9160/udp/README.html#cmdoption-arg-CONFIG_UDP_PSM_ENABLE

But, in all samples (that uses the LTE Link Control library, which is pretty much all of them) you can set CONFIG_LTE_PSM_REQ_RPTAU and CONFIG_LTE_PSM_REQ_RAT to request PSM when you connect to the network.

The cloud_client can also be used, and as it seems to have been written with PSM in mind, it might be a better sample to use than the mqtt_simple sample.