Free USB Glucose meter with OLED display (Now with teardown!)

[tinhead]

So how did you end up dumping the firmware? Just using the test points on the back? Or via the USB port?

dumped over JTAG, and yes, used the test points on back.

[tinhead]

Unfortunately the shipping costs are too high.

i paid 13USD for shippment from US to Germany, for 4pcs (so my total price was 5USD/pcs)

The trick was to ask the seller to not ship everythign (i don't need test strips or what so ever was inside) but only the "usb stick".
Many of medical stuff (well glucose testers) seller would accept this, as they can sell the test strips then separately and made
a few bucks extra.

[Stonent]

One seller is selling a coupon for a free meter for $8.99! 

As far as the older meter, they are cheaper than the STM32VLDiscovery boards I'm seeing on Ebay.

[Stonent]

Unfortunately the shipping costs are too high.

i paid 13USD for shippment from US to Germany, for 4pcs (so my total price was 5USD/pcs)

The trick was to ask the seller to not ship everythign (i don't need test strips or what so ever was inside) but only the "usb stick".
Many of medical stuff (well glucose testers) seller would accept this, as they can sell the test strips then separately and made
a few bucks extra.

Have you done anything interesting with it so far?

[tinhead]

no, unfortunately not (except the pinout i posted and some tests with display).

I do have a big "junk box" (actually 5 of full storage boxes) with "items i will re-use soon", like Motorola
Xoom dummy with real 10.1display, DVB-S1 Opera box, Parrot DF3120 DPFs, multiple glucose testers
(AccuCheck Compact Plus, Wellon, Contour USB, etc) and actually lot of many other usefull things - but no time for that.

I'm probably one of these "buy & try & die" junk collectors ^^

[johnmx]

no, unfortunately not (except the pinout i posted and some tests with display).

I do have a big "junk box" (actually 5 of full storage boxes) with "items i will re-use soon", like Motorola
Xoom dummy with real 10.1display, DVB-S1 Opera box, Parrot DF3120 DPFs, multiple glucose testers
(AccuCheck Compact Plus, Wellon, Contour USB, etc) and actually lot of many other usefull things - but no time for that.

I'm probably one of these "buy & try & die" junk collectors ^^

You are not alone 

[Stonent]

I do that as well!

[Stonent]

Possible identification of the second chip, a Renesas V850 chip. It appears that glucometers are one of the mentioned applications as well as they provide sample glucometer firmware.

http://datasheet.octopart.com/UPD70F3796GC-UEU-AX-Renesas-datasheet-10979623.pdf

[paru]

Hi,

Reviving the topic

Has anyone did anything with these meters (Contour USB). I found a few in a box
Should I try uploading an STM32 "standard" firmware? For what I see, besides JTAG, many ports are exposed, potentially making these devices useful.

[XOIIO]

Hmm, I wonder if any stores around here in Canada have these/would accept the coupon.

edit: US only, figures.

[Stonent]

Hi,

Reviving the topic

Has anyone did anything with these meters (Contour USB). I found a few in a box
Should I try uploading an STM32 "standard" firmware? For what I see, besides JTAG, many ports are exposed, potentially making these devices useful.

I was never able to identify the chip used.

[paru]

What chip? The main uC is easily available.

[Stonent]

What chip? The main uC is easily available.

It is made by Toshiba. The part numbers don't really pull anything up. There were two versions of this device. One with an ARM chip made by ST and the other made by Toshiba which doesn't seem to match up with anything.

[paru]

I was focusing on the ones with the STM32 chip as they seem to be the most easily hackable.
The STM32 chip is widely supported and from what I see there are quite a few ports available. Moreover, the USB may be available to the main uC, enabling a few applications.

[PatrikLundin]

Rolling in from Google. Here's a few higher res pictures of the second (partly unidentified) version. Haven't gotten anywhere much either, not anywhere near as far as the pinout stuff (guess I should have hit google before brute forcing the Customer service code by hand :-)). Not much of a hardware guy really, I have a bus pirate, ttl and regular serial adapters, an avr flasher and some experience with cell phones, kindles, general remove and replace HW fixing but I'm pretty green to deeper stuff. I was mostly hoping to attack it from the driver/firmware end, perhaps at least get some USB-controlled GPIO pins out of the deal and perhaps practice some more with reversing random devices without risking anything I can't afford to fry. Came in the hopes of some HW specs, leaving slightly better than I came (tips hat) but still not terribly close to anything.

May or may not do more, may drop more here if I do.

[Stonent]

Glad to see someone else was looking in to the Toshiba version.

[none]

I have a  regular "next" model in front of me that seems to be using a Renesas µPD70F3794  V850ES/JG3-L (on-chip USB controller) with marking "D70F3794GC". It enumerates as "Contour NEXT" USB Input Device  HID (Human Interface Device) with VID 1A79 & PID 7350. There's also a Toshiba, probably the measurement frontend. It's got a very slow b/w transflective graphics LCD with white LED backlight, I guess it's serially controlled (was not able to find info yet). Power by 2 CR2032 lithium coin cells. EEPROM, some Winbond flash, Piezo buzzer. Everything looks well-designed.

Ah, great - this has already been known: https://www.eevblog.com/forum/chat/this-might-make-an-interesting-teardown-(free-usb-glucose-meter)/msg249820/#msg249820

Anyway. I'm not familiar with Renesas MCUs but a programming adapter could apparently be built relatively easily: http://elm-chan.org/works/sp78k/report_e.html
And I've read somewhere there might be GCC support. Not sure I'll investigate further, although I'd be interested (in USB-CDC and an UART for RS-232 and of course Display+Backlight, Keys, and Buzzer). It pretty much depends on an easy toolchain.

[liamg]

Bayer updated the glucometer in Q4 2016 to add Bluetooth. New Renesas MCU and TI BLE.
I did a tear down here: www.cocoasteam.com