Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

Using wifi on a pi

midihipi last edited by midihipi

Good Day,
I am sure this has been done before but I wonder if anyone can guide me in a tutorial on how to use the built in wifi in my pi with a DIY Arduino nano and a wifi chip like an 8266 with a relay to turn on and off a socket. This will be my first project but I am lost as to whether i'll need voltage regulators or caps etc. I am sure I am in the wrong forum area etc. This is my first go at trying to figure this out. I love the site!
TIA
Brad
Reply Quote 0
1 Reply Last reply

1
Posts

510
Views

Suggested Topics

Over the air updates
General Discussion • • ToSa

87

1
Votes

87
Posts

50411
Views

I would really like to get OTA working here as it's freezing outside and I have to go there to update the software in the greenhouse control system. So please, can we have a 'how to' step-by-step guide to OTA? Please? S.
Does MySensors require Arduino Timer 2?
Hardware • mysensors interrupt nano interrupts esp • • OldSurferDude

2

0
Votes

2
Posts

21
Views

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; }
Best VOC sensor for detecting a wide range of VOC's?
Hardware • • NeverDie

3

1
Votes

3
Posts

36
Views

@eiten I haven't yet made any progress on finding a good VOC sensor, but along the way I did find out something interesting regarding CO2: namely, if you sleep with your bedroom door closed at night, then the odds are good that the CO2 levels rise to surprisingly high and unhealthy levels. The better CO2 sensors are factory calibrated and never again need recalibration for the life of the sensor (usually around 10 years or so), because they are used in HVAC systems to control fresh air intake to guarantee indoor air quality. As a for instance, here is one such CO2 sensor: https://www.digikey.com/en/products/detail/senseair/006-0-0008/15790694 At around $50 for just the sensor element itself, it's not exactly cheap, but then again, I'd say it's worth it, because who wants to be burdened by remembering to calibrate their CO2 sensors? Ideally, I'd like to find a sensitive VOC sensor that also will never require calibration. Nearly all, and maybe all, of the off-the-shelf IAQ montoring stuff that you might buy for, say, $300 or less seems to require periodic calibration. For that reason, this might be one of those occasions where build is rather than buy.
Arduino Nano Every problem
Hardware • • hakha4

6

1
Votes

6
Posts

84
Views

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?
Best time of year to buy higher quality small project solar panels?
Hardware • • NeverDie

5

1
Votes

5
Posts

70
Views

It probably has to do with fewer people buying them once summer ends, so companies might lower prices to clear out stock before winter.
Sensors and more
Hardware • • Robert Leverett

1

0
Votes

1
Posts

16
Views

No one has replied

Using wifi on a pi

Suggested Topics

Over the air updates
General Discussion • • ToSa

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

Best VOC sensor for detecting a wide range of VOC's?
Hardware • • NeverDie

Arduino Nano Every problem
Hardware • • hakha4

Best time of year to buy higher quality small project solar panels?
Hardware • • NeverDie

Sensors and more
Hardware • • Robert Leverett

80
Online

11.5k
Users

11.1k
Topics

112.7k
Posts

Using wifi on a pi

Suggested Topics

Over the air updates General Discussion • • ToSa

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

Best VOC sensor for detecting a wide range of VOC's? Hardware • • NeverDie

Arduino Nano Every problem Hardware • • hakha4

Best time of year to buy higher quality small project solar panels? Hardware • • NeverDie

Sensors and more Hardware • • Robert Leverett

80Online

11.5kUsers

11.1kTopics

112.7kPosts

Over the air updates
General Discussion • • ToSa

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

Best VOC sensor for detecting a wide range of VOC's?
Hardware • • NeverDie

Arduino Nano Every problem
Hardware • • hakha4

Best time of year to buy higher quality small project solar panels?
Hardware • • NeverDie

Sensors and more
Hardware • • Robert Leverett

80
Online

11.5k
Users

11.1k
Topics

112.7k
Posts