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Section 6 of the EnviroDIY Monitoring Station Manual has instructions and photos related to building the station you have.  Section 6.3 in particular discusses the Hydros 21 CTD sensor that you’re having trouble with.  I’m attaching a screenshot of that section of the manual.  You can see in the photos how the sensor cable has a 3.5mm stereo he…[Read more]

How is the sensor connected? To disconnect a grove plug, squeeze the lock at the top of the white connector and pull it off.  This is the headphone (stereo) jack: https://www.envirodiy.org/product/envirodiy-grove-to-3-5mm-stereo-jack-pack-of-2/. The stereo/headphone connector is just like the one on wired headphones.

Instructions for uploading csv data to Monitor My Watershed are in section 7 of the Monitor My Watershed Sensor Data Manual. Note that there are different instructions for “Uploading EnviroDIY Monitoring Station Data – Filling Data Gaps” and “Uploading CSV Sensor Data Not Already Formatted for MonitorMW”.

What sketch are you running?  The debug statements above are mentioning Digi Xbee module, but your photo shows a Simcom SIM7080 module.  The code for a Digi Xbee modem is not compatible with the Simcom module shown in the photo.

If you’re trying to use the configuration shown in the photo, along with a Hyrdos 21 CTD sensor (as indicated in your c…[Read more]

Hi Sara and Shannon,

I am also getting the “could not wake modem for clock sync” error. I do not know if it’s connected but when the logger records to the SD card (after giving the “could not wake modem for clock sync” error) it records at random time intervals and only takes a few data points before stopping.

Here is the debugging information I…[Read more]

Well as you can see this thread is almost 3 years old. I haven’t tried anything more than what was mentioned above. Your analysis is solid however its dealing with any current pulses and battery voltage measurement circuit.

I’ve had some response from  staging.monitormywatershed.org:80

but then it seems to become unreliable.

https://github.com/WikiWatershed/monitor-my-watershed/issues/752

I’ve also seen similar results when working with long-term outdoor deployments. The low quiescent currents are encouraging, but as you noted, the internal resistance of LiSOCl2 becomes more noticeable as the battery ages, especially under load spikes from sensors or radios. A good-sized supercap buffer really helps smooth that out.

If anyone is c…[Read more]