Activity

Oops. Sorry. I’d typed that and didn’t see your response. But yes, slowing down the ESP8266 is the way to go if you want to make sure everything is heard correctly.

Yes, I’ve had problems with the Mayfly receiving data at 115200. The Mayfly is only running at 8MHz and Atmel says the error rate at that baud and crystal combination is 8.5%. The error is a much bigger problem on the receiving end than the sending end. So the serial port monitor and the ESP8266 understand what the Mayfly is saying at 115200,…[Read more]

SOLUTION:

I changed the default baud rate on the ESP8266 from 115200 to 9600 and things started working. The AT command I used was AT+UART_DEF=9600,8,1,0,0

Here is where I found this command:
https://arduino.stackexchange.com/questions/24156/how-to-change-baudrate-of-esp8266-12e-permanently

Just curious why the ESP8266 wasn’t working at 115200?…[Read more]

My error was indeed in how I downloaded the files. Shannon, thank you for setting me straight. Daniel, thank you for the image.

Sara, thank you for your response. I’m glad to hear it is possible. Here’s what I’ve got thus far.

Mayfly <—-> ESP8266 ESP-01
Rx1 <——-> Tx
Tx1 <——-> Rx
Gnd <——-> Gnd
Sw3 <——-> VCC & CH_PD

//  https://allaboutee.com/2014/12/27/esp8266-arduino-code-and-circuit/

void setup()
{
  Serial.begin(9600);
  Serial1.begin(115200); //…

[Read more]

Dave,

Just curious if you ever revisited this issue over the winter? I am having the exact same issue with a Viasala WXT530 and YSI EXO. I did find a post where I guy successfully got his WXT530 to work back in 2017 (https://hankpai.weebly.com/sandbox/arduino-data-logger-vaisala-some-code). We are powering the devices with 9V and able to change…[Read more]

Dave,

I bought the PulseLarson W3554B0140 RF ANT 829MHZ/2.2GHZ PCB TRACE (https://www.digikey.com/products/en?keywords=553-2574-ND) and I’m pretty sure it works. It looks like the one that comes with the Development kit (https://www.digi.com/products/models/xk3-c-n1-ut-e).

All of the Mayfly pins are at 3.3V.

I’ve done a decent amount with a Mayfly and an ESP8266 using the “AT” firmware on the ESP8266. I haven’t had any problems with it.

I haven’t done any comparisons, but I bought Taoglas Maximus FXBU66 antennas and they seem to work quite well: https://www.taoglas.com/product/maximus-fxub66-ultra-wide-band-flex-antenna-smam/

Hi everyone,

Very quick question. Something I didn’t see listed in the above replies has to do with antenna selection. Anthony or Sara, do you have a recommendation as to an antenna for one of the new Digi LTE-M Xbee3’s? We have had really good success with the 900mhz xbees and are now working on projects where there is cell service, so we’re…[Read more]

Thanks.
The cct V0.5b shows an option of connecting the Xbee to the LiIon V_bat – which can get to 4.2V – and a very nice low impedance for the Cellular Tx power requirements.
So if the Xbee-V1-UT/XB3-C-A2 Cellular @ 4.2V was pulling up, that would over drive the mega1284 pins above their Vcc (3.3V).
At some point the megas1284 protection…[Read more]

@srgdamiano, thanks for making it really clear that the issues folks have been facing are primarily on the side of Digi’s LTE-M XBee3 hardware/software, and the work you’ve done with the ModularSensors code are all work-arounds to deal with the instability of Digi’s LTE-M XBee3 hardware/software when running on the Mayfly hardware.

I had failed…[Read more]

I just want to be really clear that the very slow connection speed and non-response is A PROBLEM WITH THE XBEE ITSELF, NOT THE CODE.

The messages like “no response received” are merely letting you know that the Bee is not responding.

There is nothing I’ve done in the code recently that changed it from “not working” to “working” with the LTE-M…[Read more]

The XBee’s are all 3.3V logic levels.

I used pin A4.

It might be an error in how the file was downloaded from Github. Try downloading this zip file that contains both the sch and brd file. Click on the gray “Download” button on the top right to download the zip file.
https://github.com/EnviroDIY/EnviroDIY_Mayfly_Logger/blob/master/hardware/protoshield/protoshield_mayfly_v1_zip.zip

I use KiCad, so I can’t help unfortunately – but here’s an image with some of the dimensions. If you need any others I can add them. The pin headers are 0.1″ spacing.

This is my first time to use Eagle. I downloaded the free version (maybe this is the issue) in an effort to view the protoshield dimensions. When I try to open the .brd file, I get the following error:

line 8, column 16: This is not an EAGLE file.

I would appreciate your insight as to what I’m doing wrong.

Oh good to hear it works.
What pin are you using on the Mayfly.? I could see the references in the code on modemConnect() but couldn’t find any designation.

One of the problems is that the ATmega1284 doesn’t have any 5V compatible pins, so it may cause some unpredictable behaviour if it pulls the mega1284 pin up too hard – which depends on the…[Read more]