[solved] Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

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tklein.lotte@web.de · #1 Post by **tklein.lotte@web.de** » 03 Apr 2017, 10:49

hi,

I don't get Data from my bmp180 connected to a Wemos D1 mini. Tried firmware R147/120/Mega.
Using a sketch I got temperature and pressure. Where is my mistake? Any ideas?

Greetings
Thomas

Shardan · #2 Post by **Shardan** » 03 Apr 2017, 11:50

Hello Thomas,

if I remember right the BMP180 is the follower of the BMP085 while BMP280 and BME 280 are different chips.

Maybe give it a try and change the task settings to BMP085 instead of BMP280.

Regards
Shardan

tklein.lotte@web.de · #3 Post by **tklein.lotte@web.de** » 03 Apr 2017, 12:02

Hi again,

sorry no changes with "BMP085" as a selected device.

Greetings
Thomas

krikk · #4 Post by **krikk** » 03 Apr 2017, 16:03

on my wemos d1 mini sda and scl are on

gpio4 (d2) and gpio5 (D1)

tklein.lotte@web.de · #5 Post by **tklein.lotte@web.de** » 03 Apr 2017, 16:13

I have changed it. No change again.

Shardan · #6 Post by **Shardan** » 03 Apr 2017, 16:36

I don't think that this is the issue, but to which GPIO's are SDA and SCL configured?
ESPEasy can set the configuration to any availlable GPIO in the "Hardware" tab.
If that's ok too i'll build a test circuit on breadboard to see if something is wrong in the firmware.

I assume it's correct as the I²C scan detects the BMP180.. but....

Regards
Thomas

JR01 · #7 Post by **JR01** » 03 Apr 2017, 16:56

Choose BMP085, I ran same config.

tklein.lotte@web.de · #8 Post by **tklein.lotte@web.de** » 03 Apr 2017, 17:09

wtf?

After rebooting and a little time without power it is working now! It's vodoo.

Thanks for supporting my bmp180 and me.

Have a nice day!
Thomas

costo · #9 Post by **costo** » 05 Apr 2017, 14:42

It is not 'voodoo'.
I found out that I2C GPIO's are only once configured during bootup. So when you change the SDA and/or SCL pinnumber you MUST reboot or else the change will not be effective. Saving the configuration of I2C is not good enough, a reboot is needed.

In my opinion there should be a note/warning with the I2C pins that you need to reboot when changing the I2C pinnumbers.

tklein.lotte@web.de · #10 Post by **tklein.lotte@web.de** » 06 Apr 2017, 16:32

Hi costo,

thank you very much for your intersting informations. I agree with you, a note should be seen in the gui.

Greetings
Thomas

Nonsense · #11 Post by **Nonsense** » 06 Apr 2017, 20:36

Hello guys!
I think that the problem was from not setting the IDX Variable and after restarting the module, the task has autocompleted the field for IDX. As you can see from the screenshots.
I had the same problem with SI7021 sensor. It didn't returned any value, but after i set an IDX it was working.
Hope that helps.

[solved] Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

[solved] Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: [solved] Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: [solved] Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

Re: [solved] Problem with bmp180 with Wemos D1 and ESP Easy (147,mega)

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