tag:blogger.com,1999:blog-8791534454145226797.post7651168013838536015..comments2017-03-07T13:55:02.250-08:00Comments on Random stuff: Connecting Polar WIND chest strap to ArduinoArtem Zavrinhttp://www.blogger.com/profile/15063561956368951220noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-8791534454145226797.post-14580213640290970022017-03-07T13:55:02.250-08:002017-03-07T13:55:02.250-08:00Hi. This is very interesting. Had you considered j...Hi. This is very interesting. Had you considered just connecting to the polar W.I.N.D USB key, and attaching that to your arduino, iPhone, Android, etc? The protocol over the USB would likely be the same as what is transmitted, I would guess. thttps://www.blogger.com/profile/14790946592724486333noreply@blogger.comtag:blogger.com,1999:blog-8791534454145226797.post-36258304519475846992014-11-09T11:50:27.841-08:002014-11-09T11:50:27.841-08:00hi Artem,
i building a project with arduino and n...hi Artem,<br /><br />i building a project with arduino and nrf24l01 modules and would like to read data from polar heartchest with frist arduino and then send it to an other arduino with nrf24 and lcd to display the data<br /><br />is it possible?Anonymoushttps://www.blogger.com/profile/04802624262146419525noreply@blogger.comtag:blogger.com,1999:blog-8791534454145226797.post-75504418635752538532013-01-14T17:31:15.763-08:002013-01-14T17:31:15.763-08:00Hi Artem,
I myself have started to use Polar Wearl...Hi Artem,<br />I myself have started to use Polar Wearlink for a Capstone Project. Do you recommend me using your method or buying the https://www.sparkfun.com/products/8661 Polar Heart Rate Interface. My project needs to detect heart beats, falling detection(accelerometer needed), and have some serial/bluetooth communication. The HRI would help since it has a PIC on it, and it will detect the Polar Wearlink. Let me know.Anonymoushttps://www.blogger.com/profile/02944621712211697757noreply@blogger.comtag:blogger.com,1999:blog-8791534454145226797.post-40496826863093341682013-01-09T04:24:53.217-08:002013-01-09T04:24:53.217-08:00Nicky, I have stopped reversing polar chest strap ...Nicky, I have stopped reversing polar chest strap once I have got HR data out of it. For my project that proved sufficient.<br /><br />asdasd, please keep me posted on your WIND protocol reversing.<br />As for zerod space I still think it might be related to the fact polar records R-R variability data (intervals between individual heartbeats) and several heartbeats can be recorded in each packet (up to 3 at 180bpm).Artem Zavrinhttps://www.blogger.com/profile/15063561956368951220noreply@blogger.comtag:blogger.com,1999:blog-8791534454145226797.post-50680089598194440432012-10-30T04:33:13.895-07:002012-10-30T04:33:13.895-07:00Hi Artem,
Nice work discovering the important par...Hi Artem,<br /><br />Nice work discovering the important parts of the WIND inner workings. I am about to take on a similar project and your information really helps a lot getting started.<br /><br />From the picture I can see the transmitter is controlled by a Texas Instruments micro controller running off a 32 kHz resonator. Its internal clock may be 1 MHz, but is rather inaccurate, which make me believe that byte 23-25 in the payload can be the content of a counter register.<br />The counter may be initialized to around 0x400000 for about every 7-8 payloads and decremented by a multiple of 4095 between each transmission. As the factor between each transmission is not constant, this could be the result of the inaccuracy of the internal DCO in the micro controller.<br />The cycle seems to end with a payload of 0x00038B each time.<br /><br />I have not looked into byte 26-27 yet, but it could also be an average depending on the heart rate. At first I thought it was the output of a FIR filter, but in the end it is lower than the average heart rate, so some kind of offset is applied at least.<br /><br />All the zeroed bytes puzzles me a bit, but could possibly be there for backwards compatibility issues.asdasdhttps://www.blogger.com/profile/11064167724841410324noreply@blogger.comtag:blogger.com,1999:blog-8791534454145226797.post-47933681293536462322012-08-23T01:49:48.395-07:002012-08-23T01:49:48.395-07:00hi,
did you get any progress on this ? hi,<br /><br />did you get any progress on this ? Anonymoushttps://www.blogger.com/profile/16184961051337321007noreply@blogger.com