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  • Author Author: tariq.ahmad
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Going Beyond Periodic Wakes: Using WiFi to Revive a Sleeping Device -- Episode 584

What if we could just wake up a sleeping device with a simple WiFi message? Clem thinks there should be an open source variant of everything so nobody is locked in by a vendor cloud service or anything else. And one of the things he´d like to develop is an open source security system. Recently Clem learned about the Renesas DA16200MOD WiFi module, and supposedly it can stay connected to the WiFi network even in deepsleep. So the natural question to ask is, can we also wake it up with a simple UDP message over WiFi instead of having to periodically wake it up like people usually do? The journey to success is troublesome, involved PCB operations under the microscope and a lot of sketchy arduino code...

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Bill of Material:

Product Name Manufacturer Quantity Buy Kit
DA16200MOD Renesas/Dialog 1 Buy Now
DA16200MOD-DEVKIT Renesas/Dialog 1 Buy Now
MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle Molex 1 Buy Now
MULTICOMP Battery Retainer Clip, 2450, 24mm, SMT Multicomp pro 2 Buy Now
 

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  • Hi can you do a step by step guide to the tools and configuration of the DA16200MOD?. also a mention of RTOS is this a requirement?.   Could you give some detail or outline on the steps you had made and why you chose them? thank you for the video it was  interesting to see. It will be interesting to see what others can do with this. Maybe running this in mico python and a web server with a file system like the esp32 wifi module.   Thanks for your time and effort to create the videos.

  • in reply to smith1

    A full step  by step guide might be something for a dedicated piece of content on the community.

    but here are some general points:
    you do not need rtOS OR INSTALL any lib to use the module with another mcu.
    The way I do it in the video is simply talking to the module via UART.
    By default the DA16200MOD ships with AT-Firmware. this listens to AT commands transmitted via UART.
    Refer to this doc for the Commands: https://www.renesas.com/eu/en/document/mas/um-wi-003-da16200-da16600-command-user-manual?r=1600061
    You first want to make sure the module is listening. (just by sendinng "AT")
    then set up wifi modes and SSID /passwords.

    these credentials are saved internally.

    reboot the module
    it should now connect to the specified network or open its own accesspoint depending on mode.next choose a way of communication and open a port (I used UDP as it was the easiest to get working)

    Save the config.

    reboot the module again.
    Now on boot login and opening of the port should happen on every boot automatically.

    In my case I used now a tool like packetsender to issue UDP commands and the module can receive them.

    You can now set up Sleep modes (mode 3 stays connected)
    and Wakeup methods (RTC, pin, wifi)
    and activate them with another command.

    Be careful with this step as the DA16200MOD could go back to sleep super quick before you get a chance to transmit the "stay awake command"
    I had to recover mine a few times before I got it right.
    Recovery worked by heaving the command for deactivating Sleep ready in the serial terminal , resetting the chip and sending as it booted. this took a lot of tries until I got the timing right.

    Micropython/circuitpython:
    doing this with a MCU running micropython is easy, it works exactly the same as I did in the video just in micropythonpython.

    no libaries needed. but there are some available, but I dont think they support wifi wakeup yet.

    hope this helps!

  • in reply to mayermakes

    Thank you  Mayermake for your reply. looking forward to seeing further developments with this module.

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