💬 Stamp size MySensor node

[GertSanders]

@alexsh1

Here is my extract for this type:

32PinBoard.name=atmega328p based - 32 pin TQFP

32PinBoard.upload.tool=arduino:avrdude
32PinBoard.upload.protocol=arduino
32PinBoard.upload.maximum_size=32256
32PinBoard.upload.maximum_data_size=2048

32PinBoard.bootloader.tool=arduino:avrdude

32PinBoard.bootloader.unlock_bits=0x3F
32PinBoard.bootloader.lock_bits=0x0F


32PinBoard.build.core=arduino:arduino
32PinBoard.build.mcu=atmega328p

32PinBoard.build.board=AVR_GERTSANDERS32PinBoard
32PinBoard.build.variant=32PinBoard

32PinBoard.menu.bod.4v3=4V3
32PinBoard.menu.bod.4v3.bootloader.extended_fuses=0x04
32PinBoard.menu.bod.2v7=2V7
32PinBoard.menu.bod.2v7.bootloader.extended_fuses=0x05
32PinBoard.menu.bod.1v8=1V8
32PinBoard.menu.bod.1v8.bootloader.extended_fuses=0x06
32PinBoard.menu.bod.off=Disabled
32PinBoard.menu.bod.off.bootloader.extended_fuses=0x07
32PinBoard.menu.mhz.8Mi-38K4-D8= 8Mhz - internal - 38K4 - D8
32PinBoard.menu.mhz.8Mi-38K4-D8.bootloader.low_fuses=0xE2
32PinBoard.menu.mhz.8Mi-38K4-D8.bootloader.high_fuses=0xDE
32PinBoard.menu.mhz.8Mi-38K4-D8.build.f_cpu=8000000L 
32PinBoard.menu.mhz.8Mi-38K4-D8.upload.speed=38400
32PinBoard.menu.mhz.8Mi-38K4-D8.bootloader.file=myoptiboot/optiboot_atmega328_08M_038400_D8.hex

[alexsh1]

@GertSanders OK, the issue is in pins_arduino.h in 32PinBoard folder. The standard file is just not good. I'll have to find the right one for tqfp chip.

EDIT: copied the "eightanaloginputs" variant in the variant folder, but still can only upload the first sketch after the bootloader, all other uploads are giving me "avrdude: stk500_getsync() attempt x of 10: not in sync:"

[alexsh1]

@GertSanders Gert, what pins_arduino.h are you using for this board please? Can you post it here?

[GertSanders]

@alexsh1

Here is the pins_arduino.h file for the 32pin TQFP package

0_1465854245099_pins_arduino.h

[GertSanders]

@alexsh1

And here is a ZIP file with my complete atmega328p definitions

0_1465854396475_atmega328p.zip

[alexsh1]

@GertSanders Many thanks for your help. This is probably my bad luck, but I have mixed up C1 and R1 mounting them vertically (not horizontally). What a stupid mistake really given that I have checked it a few times. Anyway, now everything is working.

FYG, I looked at your pins_arduino.h - this is a standard one and it is not correct. I corrected the following entries:

static const uint8_t SS   = 14;
static const uint8_t MOSI = 15;
static const uint8_t MISO = 16;
static const uint8_t SCK  = 17;

static const uint8_t SDA = 27;
static const uint8_t SCL = 28;
#define LED_BUILTIN 8

static const uint8_t A0 = 23;
static const uint8_t A1 = 24;
static const uint8_t A2 = 25;
static const uint8_t A3 = 26;
static const uint8_t A4 = 27;
static const uint8_t A5 = 28;
static const uint8_t A6 = 19;
static const uint8_t A7 = 22;

[GertSanders]

@alexsh1
OK, I will check also on my side :-) Thanks for the feedback.

[alexsh1]

@GertSanders No worries! And signing works flawlessly on this node as well with ATSHA204A by the way :)

[alexsh1]

[GertSanders]

@alexsh1
Double plus good !
As I have no signing capability on my raspberry-turned-gateway I'm glad the hard work to simplify signing was done so well by @tbowmo and @Anticimex. Even without testing it I could assume it would work.

[Anticimex]

@GertSanders You are welcome :) Btw, if you just patch in support to generate random data for a nonce, you can use the soft signing backend on rPi.

[GertSanders]

@Anticimex
Well that sounds simple, but I'm more a hardware contributer, this is beyond my capabilities :-), especially in unix arena. I manage software developers for a living, so I know how much I do not know.

[macieiks]

Hello guys,

I am about to solder first PCB of this version. Just to be 100% sure, regarding C4 - what is the best value to use 1uF or 10uF, because I can see we can choose.

Regards,
Maciek

[GertSanders]

@macieiks

Better to use 10uF. The schematic needs to be updated (still shows 1uF, I use 10uF now).

[macieiks]

@GertSanders

Thank you for the update,
Last part what I am missing is battery holder. I was trying to search it in many stores located in my country however I was not able to get it. Is there any internet shop when I can buy online? I have one workaround to soldier different CR battery holder and connect via wires.

[alexsh1]

@macieiks I bought the battery holder on http://www.ebay.co.uk/

[AWI]

@alexsh1 The link directs me to ebay home page... (possibly a country issue) can you give the name of the item so I can search?

[alexsh1]

@AWI I just put a link to an eBay. You put "Keystone 3013" in the search and hit search :-)

http://www.ebay.co.uk/itm/KEYSTONE-3013-BATTERY-THM-RETAINER-16MM-/271911714571?hash=item3f4f337f0b:g:PsQAAOxyx-BSa7y-

[AWI]

@alexsh1 :+1: (although pretty expensive...) building on your reference I found this
Should do the job..

[scalz]

@alexsh1 do you plan to use this so small coincell with rfm69? very curious to see results regarding internal res during RX-Tx times...1.8V brownout should not be far i think..or maybe not :) because the voltage won't stay at 3v ;) but to counter effect, a nice capa at input with a current limiting resistor could help. reading/waiting voltage stabilize before transmitting can help too (I'm doing this with some CR2032 based nodes)