well my sensor was not 5v tolerant its now a random number generator , in the bin
i give up
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Re: Heart rate sensor MAX30102
well my sensor was not 5v tolerant its now a random number generator , in the bin
i give up
Warning I'm not a teacher
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Re: Heart rate sensor MAX30102
Richard which sensor did you have? Could you please let us know? for avoiding it in the future.
Based on cardiovascular medical graph, the post #44 and post #49 looks fine.
I think #49 it is a bit better which doesnt mean the in #44 the graph is not acceptable.
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Re: Heart rate sensor MAX30102
my module was clearly marked as 3.3v its the one with slots in the board to tie it on your finger
the code has little if any effect on the graphical result. the result depends on your finger and its placement
ambient light etc, my holder is a little tight it constricts circulation a bit and i need to change fingers every 10 minutes to get good data
i found a spare [must have bought 2] i will be more careful with this one.
i still cannot get a algo to find the right peaks. on a graph it looks so obvious even in the crappy reads beats are distinctive, by the absolute shits computers are stupid. breaking the search into 32 sample blocks gets me the block highest highs and lowest lows but there is no guarantee the high in a block is actually a peak or whether continues to ramp up into the next block
Warning I'm not a teacher
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Re: Heart rate sensor MAX30102
I guess you have this one
https://www.teachmemicro.com/max3010...r-for-arduino/
I also have 2 of those, but in the schematic the input voltage is 3.3V to 5V.
or you are talking about the logic level? So i also need to take care about it and supply the PIC with 3.3V.
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Re: Heart rate sensor MAX30102
interesting mine has no jumper fitted, its not dead just gives random results , temp works ok still
led still comes on
i will solder the jumper and try again
Warning I'm not a teacher
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Re: Heart rate sensor MAX30102
It is very important to:
1. have the finger cleaned with alcohol before testing and also clean the sensor with alcohol too.
2. Not pressing hard the finger on the sensor, the shell of the sensor should be lightly tight on the finger.
3. No ambient light should come in the sensor area. Most if not all commercial devices are black for a purpose.
Hope this helps.
Ioannis
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Re: Heart rate sensor MAX30102
i cleaned the screen with metho it had a spec of gunge in the wrong spot now restored. mine will not run for long at 5v 3-4 minutes then the readings are crap, jumper made nil difference. i notice the led got substantially brighter when it goes strange. 5v is a no go for this unit
Warning I'm not a teacher
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Re: Heart rate sensor MAX30102
this kind of defines the problem
peaks are easy to see, my 32 sample search yields these peaks its not easy
sample
5
51
95
98
raw data
Code:lpf red ir 4235 4275 4435 4236 4250 4443 4238 4259 4440 4241 4264 4450 4243 4265 4482 4244 4254 4471 4244 4247 4446 4243 4244 4425 4243 4250 4424 4242 4243 4394 4242 4248 4397 4241 4244 4372 4239 4232 4376 4235 4223 4377 4231 4214 4375 4227 4214 4364 4224 4212 4385 4220 4205 4382 4218 4210 4403 4218 4225 4401 4217 4216 4398 4217 4229 4398 4217 4224 4400 4218 4238 4410 4220 4244 4412 4223 4250 4401 4225 4248 4398 4226 4245 4402 4228 4247 4398 4230 4248 4386 4233 4256 4402 4232 4238 4390 4233 4250 4400 4236 4262 4405 4238 4256 4400 4237 4237 4405 4236 4235 4400 4236 4245 4420 4234 4227 4431 4235 4251 4442 4234 4234 4437 4235 4252 4432 4236 4248 4420 4239 4265 4455 4241 4263 4440 4243 4267 4436 4246 4276 4439 4245 4249 4424 4246 4255 4433 4249 4278 4442 4250 4262 4442 4252 4271 4427 4252 4254 4429 4250 4242 4408 4246 4228 4399 4241 4221 4399 4234 4195 4378 4229 4205 4378 4224 4200 4395 4220 4204 4381 4216 4200 4363 4212 4195 4377 4209 4198 4372 4208 4208 4365 4207 4215 4366 4209 4227 4375 4212 4240 4371 4213 4227 4371 4214 4229 4358 4215 4229 4353 4215 4220 4360 4215 4218 4356 4215 4222 4357 4217 4233 4365 4217 4228 4360 4218 4232 4366 4217 4222 4364 4217 4230 4366 4217 4224 4373 4216 4220 4391 4217 4233 4381 4215 4211 4391 4215 4221 4401 4215 4222 4404 4215 4222 4411 4215 4220 4425 4215 4221 4418 4216 4226 4413 4217 4233 4427 4218 4238 4421 4219 4237 4416 4221 4245 4428 4222 4237 4421 4226 4261 4422 4229 4255 4436 4233 4263 4432 4236 4269 4437 4240 4272 4423 4241 4258 4431 4241 4252 4403 4240 4246 4381 4236 4223 4368 4231 4207 4343 4227 4213 4334 4223 4206 4341 4220 4211 4338 4218 4213 4334 4214 4194 4325 4213 4209 4336 4211 4201 4326 4210 4210 4328 4209 4211 4327 4207 4205 4321 4205 4195 4332 4203 4199 4324 4203 4213 4349 4201 4194 4352 4200 4202 4341 4198 4200 4338 4198 4203 4333 4197 4197 4348 4195 4188 4356 4194 4194 4377 4194 4204 4371 4194 4202 4383 4193 4195 4408 4193 4206 4383 4194 4209 4387
Warning I'm not a teacher
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