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Sensebender Micro Mechanical design

stefaanv last edited by

Hi,

I love the sensebender micro, having about five of them around the house measuring all kinds of things. Being able to buy the assembled PCB from the internet is great !

The compactness of the design is nice for building really small sensors, but in my humble opinion has one mayor drawback. There is no easy way to mechanically fix the PCB into a housing. Not suprisingly, I haven't seen a compelling case designs for the sensebender micro yet. Most designs have the board and the batteries floating inside.

I always end up fixing the naked PCB with two-sided tape to a wall or a to a piece of furniture, usually fixing the batteries right next to the sensor PCB in the same manner. The net effect being that my wife is becoming increasingly unsupportive of my MySensors hobby !

May I suggest that for future designs the wife factor is taken into account ? Two diagonal holes to fit screws and some free PCB space underneath for supports would be very helpfull.

Stefaan
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Supposedly PIR doesn't work through glass (e.g. if looking for motion through a window), whereas I presume a microwave sensor might still work.
Does MySensors require Arduino Timer 2?
Hardware • mysensors interrupt nano interrupts esp • • OldSurferDude

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I have success! (oops, that's suppose to be Timer1) I only sample for 1/60 of a second. What I did was to back up all the timer registered I used and then resorted them after I was done sampling. (As opposed to initializing the registers in setup and then starting the timer when needed.) Now I have a Nano sampling the data and sending it to a MySensors Gateway on an RPi3B+ which then sends it to an MQTT broker runing on an old laptop. Also running on the laptop is Home Assistant running inside of VirtualBox. If MySensors does use Timer1, it appears that restoring the registers allows it to be shared. //------------------------------------------------------ISR ISR(TIMER1_OVF_vect){ // interrupt service routine for overflow TCNT1 = TimerPreloadValue; // must be first line! starts the timer counting again digitalWrite(TRIGGER_START_SAMPLE_PIN,HIGH); samplesVolts[--sample]=analogRead(VOLTS_IN_PIN); // decrement before capturing samplesCurrent[sample]=analogRead(CURRENT_IN_PIN); digitalWrite(TRIGGER_START_SAMPLE_PIN,LOW); if (!sample){ // count down to zero digitalWrite(TRIGGER_START_SAMPLE_PERIOD_PIN,LOW); // indicate that sampling is complete samplingEnd = micros(); TCCR1B &= 248; // turns off timer } } //------------------------------------------------------sampleOneCycle void sampleOneCycle(){ // back up timer registers uint8_t TCNT1_b = TCNT1; uint8_t TCCR1B_b = TCCR1B; uint8_t TCCR1A_b = TCCR1A; uint8_t TIMSK1_b = TIMSK1; // configure timer which starts the sampling noInterrupts(); // disable all interrupts TCCR1A = 0; TCCR1B = 0; TCNT1 = TimerPreloadValue; // preload timer //TCCR1B |= (1 << CS10)|(1 << CS12); // 1024 prescaler TCCR1B &= 248; // turns off timer? TIMSK1 |= (1 << TOIE1); // enable timer overflow interrupt ISR // demark sampling sample = NUMBER_OF_SAMPLES; // count down to zero digitalWrite(TRIGGER_START_SAMPLE_PERIOD_PIN,HIGH); samplingStart = micros(); TCNT1 = 65535; // first trigger right away! TCCR1B |= 1; // turns on timer interrupts(); // enable all interrupts // wait for sampling to be complete while(digitalRead(TRIGGER_START_SAMPLE_PERIOD_PIN)){}; samplingEnd = micros(); // restore timer registers TCNT1 = TCNT1_b; TCCR1B = TCCR1B_b; TCCR1A = TCCR1A_b; TIMSK1 = TIMSK1_b; }
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Just wanted to say thanks for this, it is still relevant and useful six years later !
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I bought the Every because it implied it was backward compatible with the nano. No, it's not, as we found out. Be that as it may, any word on a getting the Every working with mySensors?
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@Tmaster Never assume the original PCB was just a circuit of components, the PCB can incorporate RF shields and antenna radio ground planes...

Sensebender Micro Mechanical design

Suggested Topics

Over the air updates
General Discussion • • ToSa

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Hardware • • h01

Does MySensors require Arduino Timer 2?
Hardware • mysensors interrupt nano interrupts esp • • OldSurferDude

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Sensebender Micro Mechanical design

Suggested Topics

Over the air updates General Discussion • • ToSa

Which one should i choose? PIR or microwave sensor Hardware • • h01

Does MySensors require Arduino Timer 2? Hardware • mysensors interrupt nano interrupts esp • • OldSurferDude

Sleep mode for bmp280 Hardware • • fishermans

Arduino Nano Every problem Hardware • • hakha4

hlk-pm01 are to noisy for rfm69? Hardware • • Tmaster

19Online

11.2kUsers

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112.5kPosts

Over the air updates
General Discussion • • ToSa

Which one should i choose? PIR or microwave sensor
Hardware • • h01

Does MySensors require Arduino Timer 2?
Hardware • mysensors interrupt nano interrupts esp • • OldSurferDude

Sleep mode for bmp280
Hardware • • fishermans

Arduino Nano Every problem
Hardware • • hakha4

hlk-pm01 are to noisy for rfm69?
Hardware • • Tmaster

19
Online

11.2k
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11.1k
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