Forum Activity | EnviroDIY

neilh replied to the topic Newbie Mayfly Setup for RS485 sensor to internet in the forum Mayfly Data Logger 2 days, 22 hours ago

neilh replied to the topic AREF in the forum Mayfly Data Logger 5 days, 23 hours ago

Hello Shannon/@shicks – thanks for the detail.I missed that it was an internal connection on the mega1284 to the 3.3V
The issue with the 3.3V, is that it is connected to the LiIon through the regulator SPX3819.
The regulator has a dropout that is variable depending on the load, temperature etc – so from the datasheet at load of 500mA it could be…[Read more]

Shannon Hicks replied to the topic AREF in the forum Mayfly Data Logger 6 days, 1 hour ago

The AREF pin of the micro on the Mayfly is not tied to anything (except through a capacitor to ground as suggested in the ATmega datasheet), so when you use the standard analogRead(0) command, it uses the default 3.3v reference setting. If a user is more advanced and wants to use an internal reference by using certain commands, or by connecting…[Read more]

neilh started the topic AREF in the forum Mayfly Data Logger 6 days, 23 hours ago

Just wondering if AREF connects to a voltage source.? Looking at the rev0.5B and IC1 pin 29 labeled AREF I can’t find how AREF connects to 3.3V – but its probably I’m missing something. If it was an annotated PDF I could search for AREF.
The code suggests AREF is connected to 3.3V.
If it does connect to 3.3V, can it be disconnected, leaving C19…[Read more]

Sara Damiano replied to the topic Trouble initializing XBee3 LTE-M in the forum Mayfly Data Logger 1 week, 1 day ago

I’ve spent more time fiddling with the LTE-M XBee and I’m seeing the same results.

It’s a hardware problem, not software; the modem really does stop responding. I wonder if it’s that there’s not enough capacitance along the power line causing very short voltage drops even when it’s tied right to the battery. The user guide for the LTE-M XBee…[Read more]

Sara Damiano replied to the topic Optical dissolved oxygen solutions? in the forum Environmental Sensors 1 week, 6 days ago

I’ve made an Arduino library for communicating with the Yosemitech sensors: https://github.com/EnviroDIY/YosemitechModbus

It’s built on top of my modbus library: https://github.com/EnviroDIY/SensorModbusMaster

In the modbus library there’s a hardware folder with the plans for a little “wing” board to more easily connect a Yosemitech sensor to…[Read more]

rushi replied to the topic Optical dissolved oxygen solutions? in the forum Environmental Sensors 1 week, 6 days ago

Hi Thomas and anthony,

I know it has been long since the post was discussed but by any chance did you guys move along with the project and made any breakthroughs? It would really help me alot.

Thanks

Sara Damiano replied to the topic Error installing EnviroDIY libraries in PlatformIO in the forum Mayfly Data Logger 2 weeks, 1 day ago

Oh dear. That definitely *is* a problem. And that’s entirely my fault; I hadn’t error-checked that json in a long time. It should be fixed now.

Just FYI, there’s a lot in that library bundle.

Dave Fisher started the topic Error installing EnviroDIY libraries in PlatformIO in the forum Mayfly Data Logger 2 weeks, 1 day ago

Following the instructions at https://github.com/EnviroDIY/Libraries, I’m entering the following command into a VSCode/PlatformIO terminal: pio lib -g install https://github.com/EnviroDIY/Libraries.git#platformio.

I get this result: “Error: Could not load broken JSON: C:UsersDave’s…[Read more]

Sara Damiano replied to the topic Trouble initializing XBee3 LTE-M in the forum Mayfly Data Logger 2 weeks, 2 days ago

I’ve usually seen that “no response” pattern with the 3G XBee’s without the solder jumper. I’ve assumed it was them “browning out” as they tried to connect to the internet. With those, switching the solder jumper seemed to fix the problem. Have you been able to connect to the internet at all with the LTE-M XBee? Is it working attached to a…[Read more]

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