AT&T Iot Starter Kit (2 gen) connecting with Raspberry Pi3

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ckasky's picture
ckasky
Junior(0)

Hi Everyone,

Firstly, thank you for helping me. I'm not sure if I can connect AT&T Iot SK2 to a raspberry Pi3 board, what I want to do is collecting and filtering external data by using raspberry pi3, and then transmitting those data to M2X by SK2. But I saw that the SK2 is currently not supported in modem mode, so is it possibile that I use the Host mode in SK2 to transmit the collected data from raspberry pi3 which is connected with SK2?

Thank you so much,

Kevin

PeterF's picture
PeterF
Moderator(14)

Kevin

You are correct, "modem mode" is not supported at this time
(this requires different WNC firmware and is more challenging to support because of the diverse range of host processors that could potentially be used).

 

One option for SK2 host-mode communication of data from your Raspberry Pi-3, is to use the SPI interface for the inter-board communications. This can be prototyped using pluggable flying leads connected from SPI pins of the Raspberry Pi-3 expansion header, connected to the SPI pins on the Pmod connector (the Pmod interface uses 3.3V signal levels)

 

In this regard the following Sparkfun article provides some insights:

https://learn.sparkfun.com/tutorials/raspberry-pi-spi-and-i2c-tutorial

 

The SPI pinout on the Raspberry-Pi expansion connector is detailed here:
https://cdn.sparkfun.com/assets/learn_tutorials/4/4/9/pin-labels-on-pi-ver2.png

 

The SPI pinout of the Pmod connector is attached here (this from page 21 of the SK2 H/W User Guide):
http://avnet.me/UG-AES-SK2

 

For a reliable connection of the SPI interface between these two boards, I recommend use of female-to-female jumper wires such as the following: https://www.amazon.com/GenBasic-Female-Solderless-Breadboard-Prototyping/dp/B01L5ULRUA/ref=sr_1_5

 

Fit header pins to one end of these jumper wires so that these can be inserted into the Pmod (socket) connector. An example of long, centred header pins that are ideal for this are the following: https://www.amazon.com/DIKAVS-Break-Away-Headers-Centered/dp/B076F64ZCJ/ref=sr_1_1 

ckasky's picture
ckasky
Junior(0)

Hi PeterF

Thank you very much for providing me these documents, I will follow the guidance and try to connect them. If I got other problems about the add-on device, I will post it out. Thank you, really appreciate it.

Kevin