Hydraulic Module - Sensor values through serial

Using Arduino Project Guidance
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Greetings!

I'm in a project group (mechatronics engineer, last year) where we have made a sensor module for hydraulic systems. Temp, flow, pressure, etc. showing on a LCD screen. We have two hours of programming a week, so we learn mostly all by googling, programming and youtubing.

Our next step is to send these values from the Arduino Nano to a Particle Electron microcontroller that connects to a Blynk mobile app. I am currently working on sending these values through TX/RX. The best way I have figured out is sending all values from the 5 sensor at the same time and read each part. Either send 00 or send the values.

sensor1 = readString.substring(0, 2);
sensor2 = readString.substring(2, 4);

Do you recommend this as maybe the best way?
We have voids() for each sensor as we use a buffer (dtostrf) for the LCD. We messed a lot with it, but it is working now.

I have changed "void temp()" to "int temp()" to actually get the values out, and in the loop I got "int tempvalue = temp();" and use return; function. From there I am currently at:

if (tempvalue > 0) {
Serial.print(tempvalue);
} else {
Serial.print(00);
}

I switched here from .print to .write (?). My plan is to either send "00" or send "XX" values from all the sensors. Through serial: "AABBCCDDEE".

I am testing and trying out, but the project needs to be done next week. We have been working on it for a year. I am programming it alone without any previous programming experience, so I am calling to the gods here to put me in the right direction. Do you have any tips? Is this the right approach?

If anyone wants the Arduino code and Particle code, I am more than happy to PayPal for your service.

2

The serial input basics thread may point you in the right direction.

Avoid using the String objects in the Arduino code. Why? Read this about evils of Strings.

3

groundFungus:
The serial input basics thread may point you in the right direction.

Avoid using the String objects in the Arduino code. Why? Read this about evils of Strings.

Yes. I've read both the old version and the new one. Good tutorials. It covers mostly receiving, and not so much about sending. I could go into a new method, with start and end markers, but I don't see the point of it straight out, and I don't have much time. I got to work this weekend too. Guess I'll have to use the day and try, and if not working, I will just do the simple way and wire directly into the analog ports and discard entire serial part.

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OK apparently I don't find where I can delete this post.

I wonder if someone knows how I can limit my serial.print to two (2) characters or bits, nothing more, and if less than one, make sure it sends two, with a zero before.

FYI im googling like a hero, but not always easy to ask the right questions.

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Admin can delete my post, got help

6

Posts are normally not deleted, especially as many contain important information that can be useful to others.

In that line, it'd be highly appreciated if you'd post your solution to your problem (which is probably twofold: sprinf() to add the zeros and markers in the Serial stream to tell where your temperature data begins).

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