[RolandLeusden]

I had boards made @JLCPCB, waiting for the sensor to arrive Have been reading the whole thread, but could not find the purpose of JP 1 and JP 3.

[vvk74]

lambda 10 open air is this normal sensor behavior?

[jonbill]

lambda 10 or AFR 10?
neither sounds normal to me.

[vvk74]

/* Constant tables to interpolate lambda from given pump current
*
* Ip is datasheet value x 1000
* Lambda is datasheet value x 100

static const int16_t cjLsu49Ip[CJ_LSU_ARRAY_SIZE] = { -2000, -1602, -1243, -927, -800, -652, -405, -183, -106, -40, 0, 15, 97, 193, 250, 329, 671, 938, 1150, 1385, 1700, 2000, 2150, 2250 };
static const int16_t cjLsu49Lambda[CJ_LSU_ARRAY_SIZE] = { 65, 70, 75, 80, 82, 85, 90, 95, 97, 99, 100, 101, 105, 110, 113, 117, 142, 170, 199, 243, 341, 539, 750, 1011 };

in open air measurable IP current around 2300

[exvils]

Can someone explain to me how i upload fw to bl49sp using mega2560 (arduino as ISP)? Is it even possible or i need that Usbasp programmer?
I managed to add Minicore addon with 328p 20mhz chip, but every time i try to burn bootloader it fails on getting device signature

[metcap]

Is it correct to use the 0.0.2 firmware on the 0.0.3 board? Whats the difference between the .ino.hex vs the bootloader.ino.hex files?

[chaoschris]

hi metcap,
yes, you can use the 0.0.2 firmware on the newer board. There were only some minor improvements on the 0.0.3 board.
And there is no difference in function between the two firmwarefiles. One has a serial bootloader (which cannot be used at this hardware), the other is without bootloader.
Best regards,
Chris

[metcap]

I guess the I2C oled display still not yet supported?

[metcap]

I'm having problems getting the atmega328p-au chip, can I use the atmega328pb-an instead and just lift the 3 and 6 pins?

[metcap]

Is there anywhere I can find the Kicad files for the 0.03 board? I'd like to modify slightly the components placing for slightly easier hand soldering.