Distance Sensors HC-SR04, JSN-SR04T and more

[LisaM]

I've ordered some and are considering using it at ground floor directed downwards. That should eliminate the triggers from the next room.
I'm done rewriting it, test phase is next...

[papperone]

I've ordered some and are considering using it at ground floor directed downwards. That should eliminate the triggers from the next room.
I'm done rewriting it, test phase is next...

Please let me know as per my test the micrwave irradiates from the modules in all directions no matter how I position it
I know there are similar modules with different chipset and some kind of shielding on one side of the board in order to "cut" waves to goin that direction (so they cover only 180°)

[Shardan]

I've ordered some and are considering using it at ground floor directed downwards. That should eliminate the triggers from the next room.
I'm done rewriting it, test phase is next...

Please let me know as per my test the micrwave irradiates from the modules in all directions no matter how I position it
I know there are similar modules with different chipset and some kind of shielding on one side of the board in order to "cut" waves to goin that direction (so they cover only 180°)

Definitely. These sensors are omnidirectional.
I can make it work if i go to a wall made from ferroconcrete.
Anyways it should be possible to shield the antenna if you cover two or three sides
of a case with aluminium foil for example. But don't put the foil too near to the module,
keep some centimeters distance. Maybe use a plastic case, mount the module at the mid of the lid and cover bottom and sides for shielding...
I didn't test that yet.

Regards
Shardan

[LisaM]

Definitely. These sensors are omnidirectional.
I can make it work if i go to a wall made from ferroconcrete.
Anyways it should be possible to shield the antenna if you cover two or three sides
of a case with aluminium foil for example. But don't put the foil too near to the module,
keep some centimeters distance. Maybe use a plastic case, mount the module at the mid of the lid and cover bottom and sides for shielding...
I didn't test that yet.

Regards
Shardan

How about using the same kind of shielding/focus as on a HC-SR04? Some kind of a thin metal tube glued over the sensor...

[Shardan]

Definitely. These sensors are omnidirectional.
I can make it work if i go to a wall made from ferroconcrete.
Anyways it should be possible to shield the antenna if you cover two or three sides
of a case with aluminium foil for example. But don't put the foil too near to the module,
keep some centimeters distance. Maybe use a plastic case, mount the module at the mid of the lid and cover bottom and sides for shielding...
I didn't test that yet.

Regards
Shardan

How about using the same kind of shielding/focus as on a HC-SR04? Some kind of a thin metal tube glued over the sensor...

Microwaves are electromagnetic waves of some cm wavelengt. A metal tube very near the sensor influences the antenna tuning.
So it is better to keep some cm distance to the microwave antenna - it wil still misstune it a bit but not too much i hope.
Another way might be to tune the shielding into resonance with the antenna so it works like a radar dish or a Yagi antenna.
Might work or not, i won't predict any result.

But that won't make the microwave sensor usable for my purposes as i need a distance + threshhold.....

[toffel969]

Please let me know if anyone is using the STATE mode, state mode means that the distance is below the threshold set in the form earlier. When state mode is reached, distance below threshold, then a sensor switch event is send.

If nobody is using it, i can as well take it out...

Hi LisaM

Would it be possible to include median function of the New ping lib?(optional with parameter on device page). It can be done using a dummy device and rules, however it can b very handy when using t distance sensor a water level sensor.
Regards seb

[LisaM]

Would it be possible to include median function of the New ping lib?(optional with parameter on device page). It can be done using a dummy device and rules, however it can b very handy when using t distance sensor a water level sensor.
Regards seb

No problem, i'll add another pulldown (normal, median).

[Shardan]

Looking forward to it.....

[toffel969]

Thanks

[LisaM]

Volunteers wanted...

Tested with HC-SR04 and JSN-SR04T...

_P013_HCSR04.zip

(1.97 KiB) Downloaded 772 times

[Shardan]

I'll test as soon as i have some spare time.... might take a while.

Regards
Shardan

[toffel969]

I'll test as soon as i have some spare time.... might take a while.

Regards
Shardan

Same here... unfortunately

[Shardan]

Hello Lisa,

I've unpacked the plugin to my source folder and compiling with platformio failed.

Code: Select all

Compiling .pioenvs\normal_4096\FrameworkArduino\Updater.o
D:/ESP_MEGA_Clone/ESPEasy-mega_20170818 - HCSR04/src/_P013_HCSR04.ino:12:21: fatal error: NewPing.h: No such file or di
rectory
#include <NewPing.h>
^
compilation terminated.

Is there a library missing in the .zip-file?

Regards
Shardan

[LisaM]

The newping lib can be found here: https://bitbucket.org/teckel12/arduino- ... /wiki/Home

[Shardan]

Quick breadboard setup, tested with the last Github version.
Distance - works
Threshhold - works
Free mem - 21624 constant.

Looks good so far. Can't test the JSN-SR04T, i don't have one yet.

Regards
Shardan

[LisaM]

Quick breadboard setup, tested with the last Github version.
Distance - works
Threshhold - works
Free mem - 21624 constant.

Looks good so far. Can't test the JSN-SR04T, i don't have one yet.

Regards
Shardan

Great, thx for testing!
i have a JSN-SR04T running for week now, hopefully this can be confirmed by somebody else also. After confirmation, it's time to upload it into P013...

[Shardan]

Anytime

I'll let the breadboard run for a while and look if memory changes or such,
maybe combine it with a BME280 or such to see if anything interferes.

Regards
Shardan

[LisaM]

Anytime

I'll let the breadboard run for a while and look if memory changes or such,
maybe combine it with a BME280 or such to see if anything interferes.

Regards
Shardan

sonic.JPG (158.63 KiB) Viewed 63390 times

sonic mem.JPG (59.22 KiB) Viewed 63389 times

[rol-rider]

Hello,
I tested both sensors.
the hc-SR04 ------- distance = 180cm - ok ---- distance <to 20cm --- ok
the JSN-SR04T --- distance = 180cm - ok --- distance <to 20cm --- NOK

the JSN-SR04T looks less good for distances <20cm

excuse me for English .... google translate

[LisaM]

Hello,
I tested both sensors.
the hc-SR04 ------- distance = 180cm - ok ---- distance <to 20cm --- ok
the JSN-SR04T --- distance = 180cm - ok --- distance <to 20cm --- NOK

the JSN-SR04T looks less good for distances <20cm

excuse me for English .... google translate

That is true, the specs for the JSN-SR04T clearly indicate that the JSN-SR04T is not useable for distances less then 20cm:

Electrical parameters: JSN-SR04T

Working voltage: DC 3.0-5.5V
Working current: <8mA
Acoustic emission frequency: 40khz
Farthest distance: 600cm
Nearest distance: 20cm
Distance accuracy: ±1cm
Module size: 42mm*29mm*12mm
Resolution: about 1mm
Angle: 75 degrees
Working temperature: -20℃—+70℃

[rol-rider]

OK !
its good
and even with vcc 3.3V

[sammyke007]

So the waterproof JSN-SR04T version is not measuring closer than 20cm correctly?
HC-SR04 with some selfmade waterproofing it will be then

[Domosapiens]

It seems that this PLUGIN_13 from LisaM

//#######################################################################################################
//#################################### Plugin 013: Ultrasonic Sensors ###################################
//################ models: HC-SR04, SRF05, SRF06, DYP-ME007, JSN-SR04T & Parallax PING ##################
//#######################################################################################################

viewtopic.php?f=5&t=3432&hilit=HC+SR04+ ... =10#p18413
never was integrated in the Mega branch. The version in the Mega branch has a header like this

//#######################################################################################################
//#################################### Plugin 013: HC-SR04 ##############################################
//#######################################################################################################

For what reason, it was not integrated?

[Shardan]

That's an interesting question.

I've been testing that plugin for a while, it worked nicely for me.

[TD-er]

Could you please add an issue here: https://github.com/letscontrolit/ESPEasy/issues ?
It keeps merging/fixing things a lot easier.

[Domosapiens]

Sherdan and TD-er ... thanks for your acknowledge.
Opened issue: https://github.com/letscontrolit/ESPEasy/issues/782

[bogas]

That's an interesting question.

I've been testing that plugin for a while, it worked nicely for me.

Hi.
Which last version supports these sensors? Added to "mega"?

[bogas]

Please share firmware (bin) 4096kB and / or 1024 with support JSN-SR04T.

[Shardan]

So, now i'm at home and can check:
I've compiled the plugin with ESP-Mega with Sources from Aug. 18. 2017.

I've a compiled version for 4096KB on my HDD, it is attached.
Please remember that this is not an officially supported version.

Regards
Shardan

firmware4096-hcsr04.zip

(361.68 KiB) Downloaded 582 times

[JojoS]

Hi,
there is an update for the US plugin. I have fixed some errors, now multiple sensors are possible. The plugin supports the median filter from the NewPing class, output as cm or inch (although this was possible with a formula expression already). I have changed also the calculation from integer to float so that you will see fractions of cm or inches.
For better troubleshooting, some more detailed errors will be shown in the log.

[HomeJCL]

Hi

Read it this morning, was nearly to jump ship for that measurement, you make my day, will test tonight

[grovkillen]

Hi,
there is an update for the US plugin. I have fixed some errors, now multiple sensors are possible. The plugin supports the median filter from the NewPing class, output as cm or inch (although this was possible with a formula expression already). I have changed also the calculation from integer to float so that you will see fractions of cm or inches.
For better troubleshooting, some more detailed errors will be shown in the log.

Great job JoJoS!

[tparvais]

Hello

I've tested my JSN-SR04T (not version 02) , never used with last Mega build 20200328. It does not work. Measure = 0
I i use my HC-SR04, it works fine.

should it work for both with same plugin ?

Im' a bit los of what I shall do. I don't have a scope to idetnify the problem

Any idea ?

Thank you

Thomas

[TD-er]

This datasheet (https://www.makerguides.com/wp-content/ ... asheet.pdf ) does mention a resistor on R27 to switch between different modi.

Open = similar behavior to the well known other Ultrasonic sensors
47k = switch to serial mode continuously sending distance in mm
120k = serial mode starting in stand-by and you have to wake it.

[tparvais]

This datasheet (https://www.makerguides.com/wp-content/ ... asheet.pdf ) does mention a resistor on R27 to switch between different modi.

Open = similar behavior to the well known other Ultrasonic sensors
47k = switch to serial mode continuously sending distance in mm
120k = serial mode starting in stand-by and you have to wake it.

thanks. I know the R27.
I don't have this resistor on my PCB
still searching

thank you anyway
T.

[TD-er]

How is the board powered?
Can you measure the voltage you supply to the sensor?
Maybe switch to 5V for powering the sensor and then add a small voltage divider to make sure the output of the signal pin is not over 3v3?

Maybe the GPIO connected to the trigger pin should have its pull-up resistor enabled?

[tparvais]

How is the board powered?
Can you measure the voltage you supply to the sensor?
Maybe switch to 5V for powering the sensor and then add a small voltage divider to make sure the output of the signal pin is not over 3v3?

Maybe the GPIO connected to the trigger pin should have its pull-up resistor enabled?

Wemos D1 mini, powered by USB. JST module powered by 5V. Echo output is connected to PIN5 via a zener+Resistor to decrease level (works for hc-sr04). I tried also without

I tried this very simple code without success (always 0 cm)

Code: Select all

#define ECHOPIN 5// Pin to receive echo pulse
#define TRIGPIN 4// Pin to send trigger pulse
void setup(){
  Serial.begin(9600);
  pinMode(ECHOPIN, INPUT_PULLUP);
  pinMode(TRIGPIN, OUTPUT);
  
  digitalWrite(ECHOPIN, HIGH);
}
void loop(){
  digitalWrite(TRIGPIN, LOW); // Set the trigger pin to low for 2uS
  delayMicroseconds(2);
  digitalWrite(TRIGPIN, HIGH); // Send a 10uS high to trigger ranging
  delayMicroseconds(15);
  digitalWrite(TRIGPIN, LOW); // Send pin low again
  int distance = pulseIn(ECHOPIN, HIGH,26000); // Read in times pulse
  distance= distance/58;
  Serial.print(distance);
  Serial.println("   cm");                  
  delay(50);// Wait 50mS before next ranging
}

[TD-er]

Maybe the trigger you try to send does not have the right voltage level?
Have you tried using a PNP transistor to increase the output level?

[tparvais]

Maybe the trigger you try to send does not have the right voltage level?
Have you tried using a PNP transistor to increase the output level?

I'm now feeding with real 5V, not usb naymore. Power is ok on JSN module.

[TD-er]

I was talking about the trigger signal from the ESP to the ultra sonic sensor.
Maybe the logic level is too low for that sensor to act on it?

[tparvais]

I was talking about the trigger signal from the ESP to the ultra sonic sensor.
Maybe the logic level is too low for that sensor to act on it?

I didn't try. I cannot find example with this sensor requiring this hack on the web

I've ordererd i a new JSN.

In meantime, I've installed a HW-SR04T that will work the time to receive the waterproof one hopefully...

Thank you

Thomas

[TD-er]

You can also try to use the Serial Proxy plugin (highly experimental) and switch this sensor to output the serial values.
These can then be sent to a controller (e.g. MQTT controller) as a string, so you may send the data directly to the receiving end and not having to mess with real time aspects of the ESP.