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having trouble with low power pro mini

6 years 4 months ago #1709 by 5546dug
I have followed the low power guide and have educated myself as best I could
1 I am using the arduino as isp guide, I have set up a nano clone as programmer using proper board and chip and com port, and have installed the arduino isp sketch in the nano successfuly.

2 The wires have been set as pics between nano and pro mini and been rechecked several times, there is 10 uf cap between reset and ground on programmer. Wire is from pin d10 on nano to reset on promini.

3 many tries later and much internet reading and education found how to send the fuse change to the promini (which is now set on board, chip and com port to suit it.

4 open command promt and type in "avrdude -c arduino -p m328p -P com4 -u lfuse:4:0x62:m" and hit return
there is a short time when there is a tiny flick seen in the rx/tx leds on nano only ( maybe .1 of a sec

5 receive the reply in command promt of " avrdude: stk500_getsync<> :not in sync: resp= 0x:00" followed by " avrdude done. Thank you."


6 What do I nned to try to get this code in the pro mini it seems as thought the two arduinos are not talking. Spent hours on the internet trying things and reading to no avail.

I have tried using ide 1.6.4 and 1.0.5.r2
the new board easyiot sensor 328p is in board.txt file

is there any significance to the first part of these lines s32801?

Sorry for the long post and thanks for any info or the solving of my problems
doug r

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6 years 4 months ago #1710 by 5546dug
found a site it told me to set -b 57600 baud
guess it worked got reply of " device signature = 0x1e950f"

what ever that means

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6 years 4 months ago #1744 by 5546dug
update
I have tried to upload the Humidity Sensor sketch from my sensors and it compiles ok but uploading I receive the code at bottom of screen with
" avrdude : stk500-getsync(): not in sync : resp 0x=00"

What do I need to do to get the promini and arduino ide to sync?

Thanks for your help I think I am almost there.

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6 years 4 months ago #1745 by 5546dug
Just more info when the sketch is being uploaded, by the use of FTDI USB to TTL Serial Adaptor, the Rx led flashes three quick times with no light from the Tx led.

I believe the promini set at low power (1.8 volt 1 MHz) as per this web site is flashing the BLINK program both before and after the attempted upload.

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6 years 4 months ago #1746 by cdj
This is what i've done to realize it :

1) Remove regulator and led
2) load arduino isp on nano and connect :

nano mini
10 rst
11 11
12 12
13 13

104 caps between gnd and rst of nano !!! (very important)

installed winavr

and then rock'n'roll :
avrdude -c arduino -v -p m328p -P com3 -b19200 -U lfuse:w:0x62:m
avrdude -c arduino -v -p m328p -P com3 -b19200 -U efuse:w:0x07:m

IMPORTANT : BAUD RATE -b19200 !!!

Hope this works also for you... 2 days of my work :)

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