@strixx actually a have a similar problem but my OpenHab sends random notifications maybe every 2 days that motion was detected but i didnt debug yet. Whatever .. do you power your PIR with 5v ? With 3.3v for sure this will happen.

Is it normal to use GPIO15 ? Isn't it used for booting mode ?

@tbowmo are they alkaline or lithuim ?

Thanks all.

Actually @tbowmo i was asking about bootloader because I have opened another thread reagrding a problem where my node stops working sometimes when i use 1 Mhz. So i was asking what would it be the problem ? And what booloader + power supply technique do people use.

Any updates here please ?

@tbowmo Thanks for the info.

So here I have two questions. How do you power your node/radio ? how much days did it survive till now ?

@tbowmo wow 2.5 years !! Which bootloader are you using for your sleeping node ? It is Sensebender or did you modify it ?

Hello,

I recently was testing different boatloaders for Door sensor. I use 2x AAA batteries for my test.

First one which caused the problem was : APM Optiboot internal 1MHz noBOD 9600baud

apm96.name=APM Optiboot internal 1MHz noBOD 9600baud

apm96.upload.tool=avrdude
apm96.upload.protocol=arduino
apm96.upload.maximum_size=32256
apm96.upload.speed=9600
apm96.bootloader.tool=avrdude
apm96.bootloader.low_fuses=0x62
apm96.bootloader.high_fuses=0xde
apm96.bootloader.extended_fuses=0x07
apm96.bootloader.path=optiboot_v50
apm96.bootloader.file=atmega328_1a.hex
apm96.bootloader.unlock_bits=0x3F
apm96.bootloader.lock_bits=0x2F
apm96.build.mcu=atmega328p
apm96.build.f_cpu=1000000L
apm96.build.core=arduino
apm96.build.variant=standard

Then I changed to :- ATmega328 on a breadboard (8 MHz internal clock)

atmega328bb.name=ATmega328 on a breadboard (8 MHz internal clock)

atmega328bb.upload.protocol=arduino
atmega328bb.upload.maximum_size=30720
atmega328bb.upload.speed=57600

atmega328bb.bootloader.low_fuses=0xE2
atmega328bb.bootloader.high_fuses=0xDA
atmega328bb.bootloader.extended_fuses=0x05

atmega328bb.bootloader.file=ATmegaBOOT_168_atmega328_pro_8MHz.hex
atmega328bb.bootloader.unlock_bits=0x3F
atmega328bb.bootloader.lock_bits=0x0F

atmega328bb.build.mcu=atmega328p
atmega328bb.build.f_cpu=8000000L
atmega328bb.build.core=arduino:arduino
atmega328bb.build.variant=arduino:standard


atmega328bb.bootloader.tool=arduino:avrdude
atmega328bb.upload.tool=arduino:avrdude

The first one has BOD at 1.8, and I read here in the forum that Atmega328p behaves strange when set to this value, although I read also that lots of people sees this a good practice to increase node life time.

Problem till now is solved when I used the second bootloader.

My question is:

• Did anyone face this issue ?
• Which bootloader fuses do you use for sleeping nodes ? WDT disabled ? No BOD ? or do you enable them ?
• What battery types do you use ?

Please share your experience.

Thanks.

@neverdie how do you connect thr two Cr batteries ?

Another question ? I read in another comments that you need 100-200 uF capacitor so that the radio can work since thr CR battery wont be strong enough. Did you add this ?

Good topic. I have been lazy since a month to ask the same question regarding best batteries do people use for battery powered nodes ?

I have thought of using AAA batteries but I really do not know which categories do I go with. Lithuim or Alkaline ?

If you check this link https://d2ei442zrkqy2u.cloudfront.net/wp-content/uploads/2016/03/MN2400_US_CT1.pdf

You find that the Alkaline battery can operate till it reaches 1.0 v for more than 1200 service hours. So two in Series will give me 2v which are still above 1.9 for the atmega and nrf to run.

But also if you check lithuim batteries.
http://data.energizer.com/pdfs/l92.pdf

It also operates for 1200 service hours at 1.4v before the battery dies quickly.

My question. Why would I choose a more expensive option (which is Lithuim) although I can use the Alkaline which is much cheaper and may be half the price ? Will the performance is better with steady voltage using lithuim ?

Thanks.

@nca78 Thanks.

so the same define for nrf24 works for nrf52 ?

@Nca78 So you are using nrf52 ebyte with antenna and you enable the pa/lna in the project ? Can you guide me to the code for this please ?

Thanks.

@NeverDie @arraWX I ordered 10 from the buyer on ebay .. they sent me 2 free antennas.

Is signing soft supported or not yet ?

The personalizer sketch do not have hash define for the NRF52.

Thanks both for the guiding. I will look through them.

Yes I read this from the datasheet but I thought maybe MySensors defines some Pins for debugging.

How can I set them ? Any ApI refrences ?

I dont have access to the source code now. Can someone please tell which pins are configured as Tx and Rx for serial communication ?

@mfalkvidd That's what I know but as I have said, I have been facing the same error to assign an ID for my node and it was solved when I change it to static ID... strange !

I have been facing the same problem all day today. Actually as far as I remember my old nodes used to setup the node assignation to AUTO by default.

Was that changed during the last month ? because I was busy at that period.

@NeverDie Please report your results when you do.

Do you have any idea who to know the fixed hw from the non fixed ones ?