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dani68k became a registered member 1 years, 8 months ago
dani68k
@dani68k
andrew3000 became a registered member 1 years, 8 months ago
andrew3000
@andrew3000
Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 1 years, 8 months ago
The ATmega1284P processor of the Mayfly is similar to other basic Arduino boards with the 324P processor in that it has an internal 10-bit Analog-to-Digital converter (ADC). There are 8 ADC pins on the 1284P, so these pins can be used to read analog voltages, however at a pretty coarse resolution (1024 bits over the 3.3v sample range). But t…[Read more]
neilh20 replied to the topic Modbus communications on Keller CTD Sensor in the forum Environmental Sensors 1 years, 8 months ago
@dan-wachusett Gosh just seeing this – seems like you got that Keller CTD.
Just wondering did you follow the advice given from https://www.envirodiy.org/topic/keller-ctd-sensor/#post-16332
Partly its decoding the layers of software. The keller protocol is used to access the Keller CTD map. I find it most helpful to compare and trace how…[Read more]
Braedon replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 1 years, 8 months ago
How do the analog pins found on the 20-pin header (pins A0, A1, A2, etc.) differ in function and purpose from the auxiliary analog pins (AA0, AA1, etc.)? From what I’ve seen, you need to connect analog sensors to the auxiliary analog pins and use an Adafruit library to get the millivolt readings because of an ADC they are connected to. I’ve…[Read more]
neilh20 replied to the topic Power usage of Mayfly1.1 with Hydros 21 cTD and LTE BEE cell modem in the forum Mayfly Data Logger 1 years, 8 months ago
Some recent posts here explain the current difficult environment for calculating power usage on the mayfly as its dependent on a fast response from the server.
https://github.com/ODM2/ODM2DataSharingPortal/issues/649#issuecomment-1561690674
My implementation is to ensure that there is sufficient reservoir of power in the battery for taking…[Read more]
Shannon Hicks replied to the topic Mayfly v.1.1 – Clarivue Turbidity Sensor in the forum Mayfly Data Logger 1 years, 8 months ago
There’s nothing to unsolder. Solder Jumper SJ25 has 2 small pads. By default, they are separated and not connected at all, and that makes the on-board boost circuitry output 12 volts. By putting a solder blob on SJ25 and connecting the 2 pads, you add some extra resistance to the circuitry that controls the voltage and it’ll output 9 volts in…[Read more]
Steve became a registered member 1 years, 8 months ago
Steve
@skaiser
EMayerRHA replied to the topic Mayfly v.1.1 – Clarivue Turbidity Sensor in the forum Mayfly Data Logger 1 years, 8 months ago
For clarification, 9 volts is stable – which requires de-soldering the 12 volt bridge and re-soldering the 9 volt bridge correct ? In the event all 3 soldering points are connected by accident what will the results be? Is there voltage protection or will it burn out the board?
Shannon Hicks replied to the topic Curious sensor failures and cyclical measurements in the forum Mayfly Data Logger 1 years, 8 months ago
Have you tried disconnecting one sensor at a time and seeing how the other one performs? We’ve found that sometimes when one sensors fails or “goes bad”, it can cause erratic readings or performance of any other sensor that’s also connected. By unplugging each sensor independently, it’s usually easy to isolate which sensor was the actual c…[Read more]