[Elliot Ma]

Hi Shannon and Sara,

Thanks for taking a look at this. I actually JUST fixed it, and I’m not sure what I did correctly?

Nothing I did was able to wake the modem, and like Sara said, it wasn’t receiving power. I was in the midst of taking those photos you request Shannon, and I think just unplugging everything and plugging it back in fixed it… I’m very embarrassed haha.

Thank you guys anyway!

Elliot

[Elliot Ma]

Hi,

Thanks for the quick reply! I am not getting any red lights on the modem at all. I have the Mayfly plugged into my pc right now and the only lights are the orange charge light, the USB/POWER lights, and D8 is lit up as green right now.

The modem seems to be correctly seated according to the instructions. We previously were able to get this logger working before with a Clarivue10 but we ran into a bug where the logger eventually stopped saving anything to the sd card + wasn’t uploading to monitormywatershed, but it seems to be saving fine to the sd card with the Hydros 21 currently, only the LTE is not working.

I will work on getting the debugging info and get back to you.

Thanks so much,

Elliot

[Elliot Ma]

Also double checked hologram.io to check to see if the sim is active, it is. I’ve also tried swapping the battery out, taking the sd card in/out, and have messed around with

const int8_t modemVccPin = 18;

and have swapped it from 18 to -1 as per the commented code, but it has not worked.

[Elliot Ma]

Nevermind! We’ll just buy the 6600 mAh battery

[Elliot Ma]

Funnily enough, I’m having the exact same issue! Also using the ClariVUE 10 turbidity sensor. It seems that the logger is writing to the SD card instead of connecting to the SIM. Hologram is basically telling me the SIM is online and ready to be communicated with, it just isn’t receiving anything.

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