[Mappie]

Hello,

you can leave the lock byte setting empty, that is not needed.
Nevertheless this would not produce your behavior.

Try another board and look if you get same results

ok i made another board, and it gave me exact the same behavior.
then i found i made a really stupid mistake

arduino was powered by laptop, and i had i seperate power supply for the bl49sp.
the Thing was i didnt ground them together lol.

now i get these values:

Mode:PRESET
Supply:11.63
Cj:0
Mode:CALIBRATION
Supply:11.61
Lambda:1.00
Mode:CALIBRATION
Supply:11.53
Lambda:1.00
Mode:CALIBRATION
Supply:11.56
Lambda:1.00
Mode:CALIBRATION
Supply:11.68
Lambda:1.00
Mode:CALIBRATION
Supply:11.48
Lambda:1.00
Mode:CALIBRATION
Supply:11.65
Lambda:1.00
Mode:CALIBRATION
Supply:11.63
Lambda:1.00
Mode:CALIBRATION
Supply:11.58
Lambda:1.00
Mode:CALIBRATION
Supply:11.63
Lambda:1.00
Mode:CALIBRATION
Supply:11.58
Lambda:1.00
UA:305
UR:206
Mode:IDLE
Supply:11.53
Lambda:1.00
Mode:IDLE
Supply:11.48
Lambda:1.00
Mode:IDLE
Supply:11.63
Lambda:1.00
Mode:IDLE
Supply:11.60
Lambda:1.00
Mode:IDLE
Supply:11.51
Lambda:1.00
Mode:IDLE
Supply:11.53
Lambda:1.00
Mode:IDLE
Supply:11.49
Lambda:1.00
Mode:IDLE
Supply:11.60
Lambda:1.00

and it keeps idling..

ive read to power the heater i should ground the IN input on the board.
when i ground it it jumps to CALIBRATION, and stays in that mode.
could this be a Faulty sensor? or?

maurice

[Mappie]

Nvm. got it running.

is it possible to attach a display to V0.0.2a to?

// pinMode(SP1_INPUT_PIN, INPUT_PULLUP);
// pinMode(SP2_INPUT_PIN, INPUT_PULLUP);

can this be used for a display? to monitor Afr, Lambda, sensor temp, pump current..?

thanks

[NickZ]

ive made a gauge to read the serial coming out of the nano wideband, it basically looks for the key words in the serial stream and displays the value.
there maybe better ways to do it, but works for me

[Mappie]

ive made a gauge to read the serial coming out of the nano wideband, it basically looks for the key works in the serial stream and displays the value.
there maybe better ways to do it, but works for me

thanks! this is what i was thinking about just using the serial output.

but im a little confused on how to wire it.

do i need to program lets say an arduino with its own code for the display?

or can i just hook up an (serial?)display to the Rx/Tx output of the bl49sp controller?
while typing this i dont think it works like that because the display need its configs right.

maybe you have a little example of the display code/wireing?

also at this moment when i have the wb running, in a Serial terminal on laptop it is only showing: Running state, and voltage supply.
if i want more (different) values like sensor temp. etc.. do i have to change the Debug mode to 2? (atm its: 1)

sorry for all my questions. im searching the web for hours... but it confuses me the more i do lol.

[NickZ]

im still writing it. but here is a sample.
im using a STM32f103 on a custom board. but a bluepill will be the same.
the numbers counting at the bottom of the screen it for debug, checking that it hasn't crash.

void loop() {
i++;

if (Serial.available() > 0)
{ //Wait for user input }
String terminalText = Serial.readStringUntil('\n'); //Reading the Input string from Serial port.
terminalText.trim();

if (terminalText.substring(0,7) == "Lambda:")
{
tft.setCursor(45, 10);
tft.setTextColor(WHITE,BLACK);
tft.setTextSize(2);
tft.print("Lambda");
tft.setCursor(50, 40);
tft.setTextColor(WHITE,BLACK);
tft.setTextSize(2);
Calc = terminalText.substring(7,11);
AFR = (Calc.toInt() * 14.68);
tft.print(AFR);
tft.print(" ");
}

if (i > 30) {

if (terminalText.substring(0,5) == "Mode:")
{
tft.setCursor(58, 70);
tft.setTextColor(WHITE,BLACK);
tft.setTextSize(2);
tft.print("Mode");

if (terminalText.substring(5,7) == "CO"){
tft.setCursor(7, 90);
tft.setTextColor(WHITE,BLACK);
tft.setTextSize(2);
tft.print("Condensation ");
}

if (terminalText.substring(5,7) == "ID"){
tft.setCursor(6, 90);
tft.setTextColor(WHITE,BLACK);
tft.setTextSize(2);
tft.print(" IDLE ");

https://youtu.be/kSIAgktkwF8

[Mappie]

One more question for now

About sensor calibration, when the unit is powered.. it will perform a sensor calibration
this moment (when calibrating) the engine should not be running right?

how does this work out when lets say, the key is put on and the car is started right away?

[NickZ]

im not sure about how that functions either yet, haven't put on in the car yet.

[Alfagta]

One more question for now

About sensor calibration, when the unit is powered.. it will perform a sensor calibration
this moment (when calibrating) the engine should not be running right?

how does this work out when lets say, the key is put on and the car is started right away?

Hello,

during calibration the unique trim resistor is fetsched from the sensor.
So calibration isn't affected by a running engine.

Calibration is done in arround 1.5 second after power on, so fairly fast...

[Mappie]

Hi flat4power,
Version 0.0.3 will be uploaded soon to GitHub.
It will have some minor changes and also two pins more for a small internal OLED-Display. The used MP2451 is also EOL, but there are 23184 pieces available for assembly at the factory (02.02.2021).
Best regards,
Chris

any chance on uploading the Oled display code soon?

[basshunter98]

Hi guys nice project! I think i got a counterfeit cj125 lot, can somebody make some resistance measurements between ub and gnd and between diahd and diahg (should be pin 6-7 of SOIC24)? I hope someone helps me!