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Posts: 1 | Thanked: 4 times | Joined on Jul 2015
#1
Hi frinds.

I have bought this i2c-hardware to give my n900 (or if there is a way n9) missing sensores.
http://ozzmaker.com/product/berryimu...titude-sensor/

soooo, now i need a free i2c-port on my n900/n9.

i have the chip to convert the free UART-port to I2C, but this is a realy hard way (because the pins are to small):
http://www.ebay.co.uk/itm/NXP-SC18IM...-/351273098785

i think it is much more easy to by a i2c over usb converter. can you give me some advice what for an i2c-usb-converter work with n900 in usb-hostmode?

a other way can be to remove the accelometer in n900 and use the i2c of this component. my new sensorboard has an accelometer, too. i see the way to remove FMTX to get i2c, but i need this ^^

a other way can be to use the SD-card-pins. but i have no idear how.

also finaly: i search a way to connect my sensors and they have an i2c-output.

Is someone with more knolage then i have interrestet in this cheap upgreading the sensors?
(sorry about my english)
 

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Posts: 549 | Thanked: 907 times | Joined on Dec 2012
#2
Originally Posted by alawari View Post
i think it is much more easy to by a i2c over usb converter. can you give me some advice what for an i2c-usb-converter work with n900 in usb-hostmode?
I rarely use host mode but I think there is significant battery drain in usb host mode or am I wrong?
Anyway interesting idea. What about ADP1653 - LED driver. It looks like it have i2c interface and it's easy accessible.
According to wiki there are also two pads J6183 and J6184 near to FM transmitter but metal shield would have to be broken.
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Last edited by elros34; 2015-07-18 at 20:09.
 

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Posts: 549 | Thanked: 907 times | Joined on Dec 2012
#3
Don't follow me! You can easly breake your phone.
I managed to connect PCF8574 - i2c expander to n900
https://youtu.be/oMcqg3lDmes
Few pictures for the brave.
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