The WORKBENCH part 3

#451

You can if the designer of the board put the required external pull up resistor on the RFM95 NSS pin. Without the pullup the NSS pin will be floating during programming so the RFM95 can activate the MISO pin and interfere with ISP programming.

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#452

schematic-elecrow

I don’t see that resistor :scream:

#453

ISP programming might work sometimes and sometimes not.

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#454

I would add that I have had to add the resistor (temporary) to the top of the RFM98, on one board design (not mine) in order to re-program the Arduino bootloader with an ISP.

#455
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#456

2 extra pogo pins :wink:

x1425

x1427
building a node bootloader burn jig from scrap material

#457

put one with a pogo pin to the required connection

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#458

yes that’s the 'plan :sunglasses:

but first I have to do some non electronic testing :wink:

x1426

3 Likes
#459

ah the scipt kiddy DDOSser is still busy… promise your boss will hear this :sunglasses:

#460

Have the Herring travelled far, its important to keep food miles down, or are they Long Range Herring ??

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#461

LOL… :sunglasses:

every year a supprise how they will taste… this year I’m not really excited :wink:

btw you’ve seen this ?

conclusion : use a better TXCO

#462

I like them!

#463

in general… or this year ?
last year’s Herring was a bit fatter / smoother but ok… I’ll go to the shopping center later today and have a few more… just to be sure :wink:

#464

Honestly: the few times I had occasion to eat fresh herrings in Netherlands I always liked them and I would not be able to tell the difference. :yum:

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#465

25%20PM

any news on the supercap front… NO not really :sunglasses:

mayby this… what about 4x paralell ?

but ended up buying a few of these :sunglasses: for solar experiments/nodes
I think a little solar panel + reverse protection diode will do the trick for a small LP node

16%20PM

#466

Is there any recommended 'tool out there , that can recognize what bootloader is currently on the target 328p 'system ?

I only found this article from Nick Gammon
http://www.gammon.com.au/forum/?id=11633

#467

@BoRRoZ, the bootloaders I’ve put there https://github.com/hallard/Pro-Mini-ICSP-FTDI are just (as mini core) from official optiboot https://github.com/Optiboot/optiboot

I just compiled them and placed them to avoid you nasty compilation stuff and because 2 years ago, I opened an issue to Minicore to ask to put the compiled version with serial of 250K to minicore for 8MHz and It was rejected.

I’m glad now minicore have these compiled version and even with 1M speed, so you can use them with no problem, they should be the same.

Take care of your crystal, if you are using 8Mhz you will have issue with speed 115200, see my old article here
I strongly suggest using 250K version, will works every time at 4, 8 or 16MHz

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#468

@BoRRoZ this missing pullup resistor drove me mad some years ago :roll_eyes:

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#469

Bonjour @Charles ! :sunglasses:

tnx for the info.

I want to burn it on the mentioned module which has an 8 mhz x tal… don’t know anything about the qualtity so I follow your advise.

#470

Which programmer do you have ?