Hello, thanks lots for your efficient video's. Could you please send me its Gerber File. With The Best Regards, Dr. Manoochehr Farboodi. faboodi@gmail.com

@@mahsamini2022 Sorry for the ignorance of my question, but what would the Gerber Files be. Best regards, Dr. Manoochehr Farboodi.

code is running but the output values are 255 255 255 how to overcome this issue

@@2006kishu use 4800 for serial baud rate

@@2006kishu same problem Did you found how to solve the problem

Thanks bro. Keep supporting pur entire team.

Please study the sensor before u take !

Hey! Did you found out any sensor which works on hydro?

Yes use a 9-12V DC Adapter.

Check the inquiry frame. Confirm with the manufacturer. Find datasheet and check what could be the inquiry frame.

You can submerge

Not at all

@@HowtoElectronics so I can??

Hi, i was going to buy one but you always have the same problem?

@@ArizerExtreme I sent it back because it was absolutely useless for my purposes. It may indicate coductivity but it had nothing to do with npk!

@@go4minrakulyx Yes i found the same, it's bs...

Only laboratory method or lab test is available which is very expensive

This sensor is designed for soil not for water

Check the frame bit and compare with instruction manual. If the address are correct the sensor will return correct values.

Hi there Satriya, did your NPK worked after that?

Give the NPK sensor with separate power (mine-12V),i.e donot connecte the gnd to nano and 485 board. (From HK)

Kasus nya sama bang Udah terpecah kan blm masalah dmn

dah dapat solusinya mas ?

There is no info about it internal circuitry even from the manufacturer. No data-sheet no internal architecture reference. Just you need to know it works well.

@@HowtoElectronics how did you test for accuracy?

I fear the answer is that it does not, in fact, work...

I read somewhere that it might use FDR (Frequency Domain Reflectometer). But it might also just be some BS sensor.

Is this fake then? I was wondering how it differentiates between electrolytes

Give the NPK sensor with separate power (mine-12V),i.e donot connecte the gnd to nano and 485 board. (From HK)Give the NPK sensor with separate power (mine-12V),i.e donot connecte the gnd to nano and 485 board. (From HK)

Yes the connection remains same

Most of the sensors are not available.

@@HowtoElectronics Kindly friend, you could ask the manufacturer of this sensor if you could read Calcium, Magnesium and Sulfur or the other nutrients in the soil because they are of extra importance in agriculture. Oh in case you want to send me the name of the manufacturer. I thank you for your attention and I await your response.

Contact JXCTIOT china

How did it go?

Yes you can connect. But i guess NPK sensor doesn’t work with nodemcu.

@@HowtoElectronics then in arduino uno ?

This is made for soil not for water

I was wondering if this was a fake, typically it would make sense that a semipermeable and selective membrane (each to potassium, nitrogen, and phosphorous) would be needed to keep out other dissolved electrolytes. I'm hearing nothing like that here and it probably is fake and will just spit out random numbers. If you want to dissolve NaCl in water and see what happens, if it reads nothing, then try some potassium chloride solution, and see if it only reads a potassium level. Do the same with nitrogen and phosphorous. If you really want to see how accurate it is after that you can do a little math and see if the concentration is accurate. I did not see that level of scrutiny here in this video and would not waste my money on this product.

@@HowtoElectronicsI was wondering if this was a fake, typically it would make sense that a semipermeable and selective membrane (each to potassium, nitrogen, and phosphorous) would be needed to keep out other dissolved electrolytes. I'm hearing nothing like that here and it probably is fake and will just spit out random numbers. If you want to dissolve NaCl in water and see what happens, if it reads nothing, then try some potassium chloride solution, and see if it only reads a potassium level. Do the same with nitrogen and phosphorous. If you really want to see how accurate it is after that you can do a little math and see if the concentration is accurate. I did not see that level of scrutiny here in this video and would not waste my money on this product.

Not accurate. Thats the reason why manufacturer has stopped manufacturing it.

same problem please help

This is only for Soil

hello sir, ur problem is also mine so please help me when u fix it

Yes it does

I'll use npk sensor, arduino uno ch340g, rs485 module,oled will it work?

No alternative bro. There is another sensor which is more expensive AS7265x, which measure NPK value by spectral analysis method.

just dip the sensor in water, tea or soil that will show the result, 255 seams to be idle value

RS485

@@HowtoElectronics but rs485 is a device name

Rs485 is protocol Max485 is device name. Use google to learn.

@@HowtoElectronics but in google the communication between max485 and aurdino is modbus RTU protocol

I was wondering if this was a fake, typically it would make sense that a semipermeable and selective membrane (each to potassium, nitrogen, and phosphorous) would be needed to keep out other dissolved electrolytes. I'm hearing nothing like that here and it probably is fake and will just spit out random numbers. If you want to dissolve NaCl in water and see what happens, if it reads nothing, then try some potassium chloride solution, and see if it only reads a potassium level. Do the same with nitrogen and phosphorous. If you really want to see how accurate it is after that you can do a little math and see if the concentration is accurate. I did not see that level of scrutiny here in this video and would not waste my money on this product.

just dip the sensor in water, tea or soil that will show the result, 255 seams to be idle value

It won’t work as it requires power supply more than 9V

Check the website article for the link

I was wondering if this was a fake, typically it would make sense that a semipermeable and selective membrane (each to potassium, nitrogen, and phosphorous) would be needed to keep out other dissolved electrolytes. I'm hearing nothing like that here and it probably is fake and will just spit out random numbers. If you want to dissolve NaCl in water and see what happens, if it reads nothing, then try some potassium chloride solution, and see if it only reads a potassium level. Do the same with nitrogen and phosphorous. If you really want to see how accurate it is after that you can do a little math and see if the concentration is accurate. I did not see that level of scrutiny here in this video and would not waste my money on this product.

@@jonesmatthew7511 I solved it, Thanks

​@@hector2742 hey buddy, can you let me know how you solved this FFFFFFFF 255 issue?

@@luqmanafridi3952 What's microcontroller do you use?

@@hector2742 hello I used an arduino nano and the connections are same in the video. May I know how you solved your problem? I have the 6 in 1 multi-parameter sensor

60$ on Aliexpress

Hi! Have you tried it? I'm doing research on electronic measurements of NPK on soil, but a lot of people are skeptical of the measurements these sensors return.

@@newenv3770 Really?

I tried making it work with both ESP8266 & ESP32 but the sensor didn't work at all. Everytime I got 255 as output. So made a alternative method to upload the data to server using NRF24LO1 module and ESP32 gateway. You can check my other video.

@@HowtoElectronics means this sensor only works with arduino??

No idea bro. I just couldn’t get the output using ESP8266 & ESP32. You may try and let us know.

@hamza ali in Pakistan from where you get it and in how much

@@abdulcute this sensor is not available in Pakistan, I buy it online from aliexpress in 12000Rs

Results are not impressive in water.

It doesn't work with esp8266

@@HowtoElectronics en ESP32 HardwareSerial sensor(2); #include #include #include //////////////////////////////////////////////////////////////////////// // Definimos las constantes //#define COLS 20 // Columnas del LCD //#define ROWS 4 // Filas del LCD #define RS 13 #define EN 12 #define D4 14 #define D5 27 #define D6 26 #define D7 25 #define DE 23 #define RE 22 LiquidCrystal lcd(RS ,EN,D4,D5,D6,D7); //////////////////////////////////////////////////////////////////////// TaskHandle_t Task1; TaskHandle_t Task2; TaskHandle_t Task3; WiFiServer *Servidor; WiFiClient client; String cadena; boolean cliente=false; //byte NPK[]= {0x01,0x03,0x00,0x01e,0x00,0x03,0x34,0x0D}; byte NITROGENO[]={0x01,0x03,0x00,0x01e,0x00,0x01,0xe4,0x0c}; byte FOSFORO[]= {0x01,0x03,0x00,0x01f,0x00,0x01,0xb5,0xcc}; byte POTASIO[]= {0x01,0x03,0x00,0x020,0x00,0x01,0x85,0xc0}; //////////////////////////////////////////////////////////////////////// void MENU(void *pvParameter); void SERVIDOR(void *pvParameter); void LECTURAS(void *pvParameter); int lectura( byte trama[]); byte getch(); int Nitrogeno,Fosforo,Potasio; ///////////////////////////////////////////////////////////////////////// // Create An LCD Object. Signals: [ RS, EN, D4, D5, D6, D7 ] void setup() { pinMode(RE, OUTPUT); pinMode(DE, OUTPUT); Servidor=new WiFiServer(25); Serial.begin(9600); sensor.begin(9600, SERIAL_8N1);////////sensor WiFi.mode(WIFI_AP); WiFi.softAP(String("AGROLINK").c_str(),String("12345678").c_str()); Servidor[0].begin(); lcd.begin(20,4); lcd.clear(); lcd.setCursor(1,0); lcd.printf(" BIENVENIDOS A "); lcd.setCursor(1,1); lcd.printf(" AGROLINK SCOPE"); IPAddress IP = WiFi.softAPIP(); // xTaskCreate(MENU,"MENU",5024,NULL,2,&Task1); xTaskCreate(SERVIDOR,"SERVIDOR",5024,NULL,2,&Task2); delay(3000); } void loop() { } /////////////////////////////////////////////////////////////////////////// /*void MENU(void *pvParameter) { while(true) { delay(1); } }*/ /////////////////////////////////////////////////////////////////////////// void SERVIDOR(void *pvParameter) { while(true) { client = Servidor[0].available(); if(client) { //Serial.println("New Client."); while (client.connected()) { if (client.available()) { cadena=client.readStringUntil(' '); if(cadena.equals("ESCANEAR")) { cliente=true; if(Task3==NULL) xTaskCreate(LECTURAS,"LECTURAS",5024,NULL,2,&Task3); delay(200); } else if(cadena.equals("STOP")) { cliente=false; lcd.clear(); lcd.setCursor(1,0); lcd.printf(" BIENVENIDOS A "); lcd.setCursor(1,1); lcd.printf(" AGROLINK SCOPE"); } client.flush(); cadena=""; } } } delay(1); } } /////////////////////////////////////////////////////////////////////////////////// void LECTURAS(void *pvParameter) { while(true) { if(cliente) { Nitrogeno=lectura(NITROGENO); delay(250); Fosforo=lectura(FOSFORO); delay(250); Potasio=lectura(POTASIO); delay(250); client.println("N:"+String(Nitrogeno)+"mg/kg,K:"+String(Potasio)+"mg/kg,P:"+String(Fosforo)+"p/m,PH:0,T:0"); lcd.clear(); lcd.setCursor(0,0); lcd.printf("N:%umg/kg",Nitrogeno); lcd.setCursor(0,1); lcd.printf("K:%umg/kg",Potasio); lcd.setCursor(0,2); lcd.printf("P:%umg/kg",Fosforo); lcd.setCursor(0,3); lcd.printf("PH:0,Temp:0"); delay(1000); } delay(1); } } ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////// int lectura( byte trama[]) { int dato=0x00000000; int len=0; byte arreglo[12]={0,0,0,0,0,0,0,0,0,0,0,0},aux=0; digitalWrite(DE,HIGH); digitalWrite(RE,HIGH); len=sensor.write(trama,8); delay(10); if(len==8) { digitalWrite(DE,LOW); digitalWrite(RE,LOW); for(byte i=0;i 0) { aux=(byte)sensor.read(); arreglo[i]=aux; } } for(byte i=0;i

@@jesusarmandocamachofelix7430 can you share in english, it's work on esp32?

What is your problem bro?

@@HowtoElectronics I need to program Arduino for a soil NPK server, it is a sensor to measure the amount of Nitrogen, phosphorus and poitium in the soil

There is already another video with the server.

@@HowtoElectronics oky. Great!! Can you please give me the name of that Russian R&D lab?

Great!! if this technology build-in India.

I have the same concern as Varnit because of the quality of mainland China products. Can you post the name of the Russian lab if it's possible? Thank you and Merry Christmas.

I also have doubts on the accuracy of this sensor. It seems that this sensor is some how implementing an electrolysis of soil to measure the nutrients and I haven't been able to find any research material related to successful implementation of this method. It would be very helpful if you can share some data which compares the results of this sensor with lab data

@@HowtoElectronics Tem previsão de quando vai ser lançado?

Same

I'm also having the same problem

It is fixed now

@@HowtoElectronics much appreciated

hi, I have the same problem. is there any development?

Me too Do you fixe it

I spent all night to find out the solution. In my case the sensor default boundrate was 4800 instead of 9800 so, modbus initialization now looks like that: mod.begin(4800). I also had to add two 4k7 resistors to pull up I2C bus to start display working

​@@michapacholak9559 could you please tell where you added two 4.7 k resistors in the circuit?

​@@rajatvatwani7104 ​I had to add two resistors between +5V and data lines (SDA and SCL) so now both data lines are connected to power supply via 4k7 resistor. Good luck 👍

I got same problem too. do you have any development?

@@sulaimantriarjo8097 Do search for NPK sensor not working in Arduino forum. I found some leads there but first to understand whether your sensor is working or not I used Rs485 Converter and a PC using CAS Modbus Scanner Software.

@@akulavamsi4832 usb to rs485 converter? thanks. very appreciated

@@sulaimantriarjo8097 yes

@@sulaimantriarjo8097 Another Point to note is that the Jxct NPK sensor might not be reading the correct NPK values as we observed some linear trendline between N, P, K form the data of many samples. So, basically our conclusion was that the NPK sensor was only reading the Electrical conductivity and then trying to use some algorithm (which might be close to the linear I mentioned above)to give us the N, P, K values i.e., We found the NPK values shown by the sensor are not trust worthy.

Read my website article. The link for buying NPK sensor is already given.

50-60$ from the manufacturer

@@HowtoElectronics how to buy that it not available in amazon

Buy from aliexpress. Or any other chinese sites.

I'm also having the same problem

I spent all night to find out the solution. In my case the sensor default boundrate was 4800 instead of 9800 so, modbus initialization now looks like that: mod.begin(4800). I also had to add two 4k7 resistors to pull up I2C bus to start display working

Easier to add Potassium and test as it's easily obtainable.

I was wondering if this was a fake, typically it would make sense that a semipermeable and selective membrane (each to potassium, nitrogen, and phosphorous) would be needed to keep out other dissolved electrolytes. I'm hearing nothing like that here and it probably is fake and will just spit out random numbers. If you want to dissolve NaCl in water and see what happens, if it reads nothing, then try some potassium chloride solution, and see if it only reads a potassium level. Do the same with nitrogen and phosphorous. If you really want to see how accurate it is after that you can do a little math and see if the concentration is accurate. I did not see that level of scrutiny here in this video and would not waste my money on this product.