MYSBootloader 1.3.0-beta.3

[gohan]

What adapter were you using?

[slt1]

@gohan The manufacturer on the bottom of the board says robotdyn.com - lookinf at their website this is the exact one : http://robotdyn.com/catalog/adaptors/socket_adapter_for_nrf24l01_with_regulator_3_3v/

[gohan]

that is missing the decoupling capacitor. Did you solder one yourself?

[slt1]

@gohan I soldered a 4.7uF tantulum capacitor directly onto the nrf24L01. Didn't help !

[gohan]

did you try a bigger one like 47uF? Or maybe that voltage regulator is just rubbish :)

[Mark Swift]

I use these adaptor boards, I presumed they worked okay, what is missing @gohan, are the capacitors present on other adapter boards do you know? BTW the robotdyn stuff seems very well made but I've actually found their NRF's to perform very poorly.

[slt1]

@gohan The regulator is an AMS1117 on the one I got here. I will try them again as they are useful for prototyping. It was working fine for a regular sensor sending updates, but got into the issues when using OTA and trying to get some decent speed of updates going. I also thought perhaps it was a dud unit - so i tried a few others and all gave same results. So perhaps a bigger capacitor will do the trick.

[gohan]

I got some adapters on gearbest (there is only one model available) and they have also caps and so far they are working, but haven't stressed them much because my nrf modules are rubbish and I am waiting for some new ones

[jolo]

This is my first post in this forum - so hello everyone! And many kudos for all developers and contributors.
I am on my way of building distributed sensors and actuators system for astroimagers, and would love to have OTA firmware update possibility. I use nR24L01 radio and each node will be based on Atmega328 working at internal 8MHz and 3V, and have two questions:

• which bootlader hex should I write?
• does MYSbootloader support programming via serial? I tried several hex files with several fuses combinations and never succeeded to program Atmega328P via serial :(

[mfalkvidd]

Welcome @jolo !

All you need should be available at https://www.mysensors.org/about/ota
If it isn't, feel free to ask away :)

Sounds like a cool project. Can you share more details?

[jolo]

Ok, what I've done so far according to https://www.mysensors.org/about/ota:

• connected USBasp to Arduino Pro Mini and set fuses to 16MHz external oscillator (using AVRDUDESS)
• then tried to upload MYSbootlader using Arduino IDE (versions 1.6.11 and 1.8.1) but it failed with some "cannot set sck period"
• so I uploaded bootloader with AVRDUDESS
  Question is - at this stage should I be able to program Arduino Pro Mini with serial programmer, or now it can be done only using OTA? Because I am not able to do it with serial programmer and Arduino IDE.
  Burning bootloader with AVRDUDESS works fine because I changed it many times from original to MYSbootlader, also programming Arduino with precompiled sketch works fine.
  I will describe my project little bit later, when I will have more nodes working :) Currently I am on stepper motor controller node.

[mfalkvidd]

@jolo yes, MYSbootlader supports only ota. No serial.

I have updated the ota page to mention the lack of serial.

[gonzalonal]

@mfalkvidd actually looking at the code of mysbootloder, it does support STK500 protocol. I haven't test if it really works...maybe it doesn't.

[mfalkvidd]

@gonzalonal it did not a while ago according to this, but that might have changed. Maybe @tekka can shed a light?

[tekka]

@mfalkvidd The most recent MYSBootloader supports OTA and serial uploads via STK500, see here: https://github.com/mysensors/MySensorsBootloaderRF24/tree/development

[mfalkvidd]

@tekka thanks.
I did look there, but didn't find anything that I understood was related to serial. I also looked at the list of commit messages but none of them mentions anything about added support.

Anyway, thanks for clarifying. I'll update the ota page again.

[gohan]

Does that work for both nrf24 and rfm69?

[jolo]

Many thanks for help - today I made it work :) Here are my steps that worked for me:

• I used MYSController 1.0.0 beta, took bootloader MYSBootloaderV13pre.hex and uploaded to Arduino Mini Pro with AVRDUDESS and USBasp programmer
• then uploaded serial gateway sketch to another Mini Pro
• attached nR24L01+ radios to both
• connected MYSController, configured serial connection and all just started to work
• then uploaded simple DHT sketch, edited csv file in MYSController and selected it for OTA FW update

After less than minute new FW was already at the node and it started to send data. I am very happy :) I played with Arduino projects for several years, but this stuff you have made is absolutely amazing! Now time for some real nodes - first one will be stepper controller for telescope focuser.

[jolo]

It still works fine - however I have one more question, maybe stupid :) About RF channels. I use nR24L01+ radios at default channel 76, however for final solution I would like to switch to some higher freq. Does precompiled bootlader work only at this default channel 76? So if I would like to switch to channel 101 I need to compile bootloader with this setting? Or there is some magic behind that makes it work some other way?

[tekka]

@jolo Glad to hear that :) re RF24 channel: yes, you need to change and recompile the bootloader for different communication settings. See here: https://github.com/mysensors/MySensorsBootloaderRF24/blob/development/MYSBootloader.c#L45-L51