Arduino on the ID100HR fitness tracker

posted in: BLE, Bluetooth, nRF51822 | 20

Some time ago…, Goran Mahovlic commented about how he was trying to run Arduino on an IDo 003, fitness tracker / smart watch which uses the nRF51822. As I’ve been interested in smart watches for some time, I thought I’d buy the same watch, and join in the fun. Unfortunately the first watch I bought didn’t contain an nRF51822 (see my other post about nRF51 based smart watches), so I ordered 2 more of … Read More

Don’t buy this smartwatch / fitness tracker !

posted in: BLE, nRF51822 | 14

Just a quick post about another smartwatch / fitness tracker that I was miss-sold on eBay Its title was A16 Bluetooth Smart Watch Health Wrist Bracelet Heart Rate Monitor Sports New Do NOT buy this watch http://www.ebay.com.au/itm/182341391730   It is listed as using the Nordic nRF52832 Bluetooth MCU, but when I opened the watch to see how to reprogram it, I found it contained a Dialog processor   Unfortunately as I had already accepted … Read More

BBC Micro bit hardware designs are now available on github

posted in: BLE | 0

I think the profile of the nRF51 is about to take a big leap forward, as the previous closed hardware design for the BBC Micro-bit, which has been rolled out around a million school children in the UK, has not been released on GitHub https://github.com/microbit-foundation/microbit-reference-design There is a press release http://www.bbc.com/news/technology-37682405  indicating that the micro bit foundation will be encouraging the use of the design throughout the world. I am not a lawyer, but … Read More

nRF51822 based fitness trackers

posted in: Arduino, BLE, Bluetooth | 26

As regular readers of my blog will know I’m an ardent fan of the Nordic nRF51 (and nRF52) series of Bluetooth Low Energy MCU’s. So when I found out that a number of fitness tracker / smart watches, used the nRF51822 and could be easily opened and reprogrammed I was very interested and ordered 2 of them to try. Unfortunately soon after I ordered them, it became clear that the model I had ordered … Read More

Troubleshooting the nRF51822

posted in: Arduino, BLE | 6

I’ve had quite a few comments where people are having problems uploading or running sketches on the nRF51822, so as I don’t have time to answer individual questions, I thought it best to try to cover the main reasons that things may not work   Device is not recognised by Blackmagic probe or possibly not by JLink Originally I had a lot of issues with Blackmagic probe not recognising the ID code in the … Read More

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