arduino Phmeter

[tuyentiensinh]

Hello Kevinlohk, i have some question about arduino ph meter.

1. like your posted, i think to read Ph value on LCD we must to have a probe Ph connect with Board Module DS18B20 LM35 Temperature Sensor but in your hardware i see you dont mention about Ph probe just have temprature probe in Board Module DS18B20 LM35 Temperature Sensor.
2. do you have the app to send Ph value from LCD to phone? because my project want to read ph value at offshore of the pond. hope you help me. thank you.

[kevinlohk]

Dear sir ,

1) yes , u need a ph probe connect to the board via BNC connector. I didn't sell ph probe (since it have liquid inside , cannot send via air mail) , so I didn't put the photo on it.

2) UNO didn't have network access . So it cannot send to your phone directly. In my mind , I have few method. 1) in my GitHub , there have a VB program to read the ph value from UNO , so u can treat your windows PC as a bridge , read from UNO and send email or any other action to your phone.

2) in my sketch , it have serial communication protocol , so u can read the data from any device that have USB port. I try to make in Raspberry PI , actually is do the same job as VB program , but now it run in Linux instead.

If u have any question, please let me know.thx

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tuyentiensinh notifications@github.com 於 2015年6月11日 下午11:39 寫道：

Hello Kevinlohk, i have some question about arduino ph meter.

1. like your posted, i think to read Ph value on LCD we must to have a probe Ph connect with Board Module DS18B20 LM35 Temperature Sensor but in your hardware i see you dont mention about Ph probe just have temprature probe in Board Module DS18B20 LM35 Temperature Sensor.
2. do you have the app to send Ph value from LCD to phone? because my project want to read ph value at offshore of the pond. hope you help me. thank you.

— Reply to this email directly or view it on GitHub.

[tuyentiensinh]

Hi Kevinlohk i have some trouble: 1/ when i put probe ph into calibrate solution ph4 but on LCD display ph= -1.32 2/ when i put probe ph into calibrate solution ph4 after that press KEY Right and LCD display R=886 not 655 as you say.

• room and water temperature it's ok but value ph so dont correct, before i put probe ph into calibrate solution ph4 on lcd already display ph=1.34 and when i put probe into solution ph4 on lcd display ph value = -1 or -1.32 not correct =4 . hope you help me.

2015-06-11 22:51 GMT+07:00 Kevin Lo notifications@github.com:

Dear sir ,

1) yes , u need a ph probe connect to the board via BNC connector. I didn't sell ph probe (since it have liquid inside , cannot send via air mail) , so I didn't put the photo on it.

2) UNO didn't have network access . So it cannot send to your phone directly. In my mind , I have few method. 1) in my GitHub , there have a VB program to read the ph value from UNO , so u can treat your windows PC as a bridge , read from UNO and send email or any other action to your phone.

2) in my sketch , it have serial communication protocol , so u can read the data from any device that have USB port. I try to make in Raspberry PI , actually is do the same job as VB program , but now it run in Linux instead.

If u have any question, please let me know.thx

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tuyentiensinh notifications@github.com 於 2015年6月11日 下午11:39 寫道：

Hello Kevinlohk, i have some question about arduino ph meter.

1. like your posted, i think to read Ph value on LCD we must to have a probe Ph connect with Board Module DS18B20 LM35 Temperature Sensor but in your hardware i see you dont mention about Ph probe just have temprature probe in Board Module DS18B20 LM35 Temperature Sensor.
2. do you have the app to send Ph value from LCD to phone? because my project want to read ph value at offshore of the pond. hope you help me. thank you.

— Reply to this email directly or view it on GitHub.

— Reply to this email directly or view it on GitHub https://github.com/kevinlohk/ArduinoPhMeter/issues/1#issuecomment-111180604 .

[kevinlohk]

Dear sir ,

You need two solution for calibration. 1st , u need PH 7 solution , put the probe into ph7 solution , write down the R:?? Value. 2nd , u need PH4 solution , put the probe into ph4 solution and write down the R:?? Value (as u said that is 886)

Then put the ph4 and ph7 value in the UNO file ,compile and download to the UNO again.

Thx

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tuyentiensinh notifications@github.com 於 2015年6月17日 下午2:23 寫道：

Room tempertature, Water temperature it's ok but value Ph so dont correct, i dont know why. when i dowload code to uno on lcd display ph= 1.34 after that i calibration by put probe ph into calibrate solution ph4 on lcd display ph=-1 or -1.32.

2015-06-17 12:11 GMT+07:00 Tuyên Tiên sinh tuyentiensinhspkt@gmail.com:

Hi Kevinlohk i have some trouble: 1/ when i put probe ph into calibrate solution ph4 but on LCD display ph= -1.32 2/ when i put probe ph into calibrate solution ph4 after that press KEY Right and LCD display R=886 not 655 as you say. hope you help me.

2015-06-11 22:51 GMT+07:00 Kevin Lo notifications@github.com:

Dear sir ,

1) yes , u need a ph probe connect to the board via BNC connector. I didn't sell ph probe (since it have liquid inside , cannot send via air mail) , so I didn't put the photo on it.

2) UNO didn't have network access . So it cannot send to your phone directly. In my mind , I have few method. 1) in my GitHub , there have a VB program to read the ph value from UNO , so u can treat your windows PC as a bridge , read from UNO and send email or any other action to your phone.

2) in my sketch , it have serial communication protocol , so u can read the data from any device that have USB port. I try to make in Raspberry PI , actually is do the same job as VB program , but now it run in Linux instead.

If u have any question, please let me know.thx

從我的 iPhone 傳送

tuyentiensinh notifications@github.com 於 2015年6月11日 下午11:39 寫道：

Hello Kevinlohk, i have some question about arduino ph meter.

1. like your posted, i think to read Ph value on LCD we must to have a probe Ph connect with Board Module DS18B20 LM35 Temperature Sensor but in your hardware i see you dont mention about Ph probe just have temprature probe in Board Module DS18B20 LM35 Temperature Sensor.
2. do you have the app to send Ph value from LCD to phone? because my project want to read ph value at offshore of the pond. hope you help me. thank you.

— Reply to this email directly or view it on GitHub.

— Reply to this email directly or view it on GitHub https://github.com/kevinlohk/ArduinoPhMeter/issues/1#issuecomment-111180604 .

— Reply to this email directly or view it on GitHub.

[tuyentiensinh]

thank you so much, i succeed. have a nice day.

[andy1967]

hello is the temp reading if F or C ? if it is in C how do i convert it to F ? and also is the ph reading after it is calabrated gonna read if my ph is 7.o will re display 7.0 or will it display as a voltage reading 2.5vdc