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The polarity of your battery pack is backwards, which is why your board was damaged.  We mention the caution about battery polarity in multiple places on this website, and also in the EnviroDIY Monitoring Station Manual, and specifically in Section 6.1 (https://www.envirodiy.org/knowledge-base/building-an-envirodiy-monitoring-station/).  I’m a…[Read more]

Some LiPo batteries have the JST connector reversed and that may be your problem.  Check the battery with a VOM to make sure the red wire is + and black is –

Hi Shannon,

We’re working with Atlas Scientific sensors. Our final set up will include three sensors – pH/temperature, dissolved oxygen, and conductivity.

We’ve installed several stations in tidal areas by attaching the sensor to a custom apparatus mounted to docks or piers.  What kind of sensors are you planning to install?

A couple bits of additional info. To visually identify whether your Hydros 21 is a Gen 1 or a Gen 2, see attached photos of the sensor head on each version. Note that some Gen 1’s had red cables, but not all.

Second, as Shannon noted in the post she linked to above, the address-setting on the Gen 2 is slightly more finicky; you just have to…[Read more]

Yes, the update made to the ModularSensors code in in order to fix Hydros 21 is backwards compatible.  I mentioned it last week in this post: https://www.envirodiy.org/topic/hydros-21-decagon-ctd-reading-error/#post-17066

It seems that in the past year Meter Group made some changes to the amount of time the CTD sensors need to take a…[Read more]

Does the new setting still work with the older sensors?  Do we need to maintain 2 sets of code?  Thx.

Noted. Thank you. This is in my next couple weeks of existence.

That was it – thanks!

-Matt

When you’re connected to the Mayfly with your computer, open the Arduino IDE’s Serial Monitor and check the settings of the dropdown box in the lower right hand part of the windows next to the baud rate.  It should be set to “No line ending”.  If you have it set to anything else, you’ll usually get an error when setting the address using that s…[Read more]