Smart cutebot using Microbit v2 on Espruino IDE questions

[espruino-discuss]

Posted at 2022-03-21 by kakcalu13

Hi everyone,

I'm very new with Espruino and Javascript. I am learning Javascript from w3_school

Microbit...on other hand...it seems that everything is explained on Microbit

As this is concise and clear tutorial however, I noticed that there is no information anything about write digital, read digital or move the motor using smart_cutebot

I tried I2C and it says I2C.writeTo() is not found.

I've been trying new stuff on this microbit and I feel like I'm nowhere near to the start one.

So I come here to seek for your advice, or suggestion.

[espruino-discuss]

Posted at 2022-03-21 by @MaBecker

check the pinout and try I2C1

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Posted at 2022-03-21 by @MaBecker

https://www.espruino.com/MicroBit#pinout

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Posted at 2022-03-21 by kakcalu13

Hi Mabe,

Thank you so much for your time!

Yeah, I ran I2C1 too. See here that I just did 15 minutes ago before began my level 5 search in Google :P

print(I2C.find(D20));
I2C1.setup({ sda: D20, SCL: D19 });
I2C1.setup();

I get error like this:

Uncaught Error: Unknown option "SCL"
 at line 1 col 34
I2C1.setup({ sda: D20, SCL: D19 });

also when I wrote to robot to see if it will at least move the right wheel by doing this:

I2C1.writeTo(0x08,1)

Seems no luck. :(

---

Posted at 2022-03-21 by @MaBecker

use scl not SCL

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Posted at 2022-03-21 by kakcalu13

That seems it move forward, but it returns the undefined.

I2C1.setup( { sda: D20, scl: D19 } );
=undefined

See here full snippet:

>I2C1.setup( { sda: D20, scl: D19 } );
=undefined
>I2C1.setup();
ERROR: SDA and SCL pins must be valid, got 255 and 255
=undefined
>I2C1.writeTo(0x10,10)
=undefined
>I2C1.writeTo(0x10,1)
=undefined
>I2C1.writeTo(0x10,1);
=undefined
> 

As you may tell that I'm very new to this. This feels like I'm trying to push a wooden triangle in the circle hole without knowing what those are.

I followed the tutorial and it worked but when it comes to me trying to move the motor, it didn't work. Any advice?

I truly appreciate your time!

---

Posted at 2022-03-22 by @fanoush

but it returns the undefined.

https://www.espruino.com/FAQ#when-i-type-a-command-why-does-espruino-print-undefined-

As for "I2C1.setup(); ERROR: SDA and SCL pins must be valid, got 255 and 255" why are you calling setup again (in wrong way)? you already set it up correctly in line above.

[abdurrehmanakhtar]

Hello Guys,

Got any success with I2c?

[gfwilliams]

I2C on microbit 2 should work fine. You can always use software I2C on any pins which'll work just as well