coap server with i2c

RE: coap server with i2c

samchang — Tue, 02 Aug 2016 07:59:36 GMT

HI , GNoB is the way coap server with i2c works with you ??

I just combines the CoAP server with the humidity example separately, and I also don't know how to transfer the sensing data into CoAP packets.

but I know that we can make it by just designing CoAP packets!

thanks!!

RE: coap server with i2c

samchang — Tue, 02 Aug 2016 07:52:46 GMT

hello stian I want to do the things as same as GNoB in this example ( \nrf51\examples\iot\coap\ipv6\server) so do I need to use your sugggestion which you mention in second paragraph (some function in cloud example) to my example ( \nrf51\examples\iot\coap\ipv6\server) ? By the way,do you have some DEMO codes about CoAP server with others sensors? Thanks!!!

RE: coap server with i2c

Stian Røed Hafskjold — Wed, 13 Jan 2016 10:38:14 GMT

It should not be a problem to sample data on the TWI (I2C) and send this data over CoAP.

Take a look at the example in iot/cloud/coap/data_source, here sensor data is sent in given intervals over CoAP. The data to be sent is prepared in coap_request_send(). In the example the sensor data is just stored in an array in m_data_points, but you can easily substitute this with data sampled over TWI.

I'm not sure how it is to combine your I2C mbed code with the IoT code, but if you take a look at the nRF5 SDK, you can find examples there on how to initialize the TWI and how to sample data. Just copy this code over to the IoT example, and then in the coap_request_send() you can call the function to read data over TWI.