I would suggest using the members of string, but with an explicit encoding: byte[] bytes = text.getBytes(“UTF-8”); String text = new String(bytes, “UTF-8”); By using an explicit encoding (and one which supports all of Unicode) you avoid the problems of just calling text.getBytes() etc: You’re explicitly using a specific encoding, so you know which encoding … Read more
for(;;) { } functionally means while (true) { } It will probably break the loop/ return from loop based on some condition inside the loop body. The reason that for(;;) loops forever is because for has three parts, each of which is optional. The first part initializes the loop; the second decides whether or not … Read more
I recently dabbled into this. The Arduino automatically resets when it receives serial communication from most things other than the Arduino IDE. This is why you can send from the IDE but not node.js. I have an Uno and put a capacitor between Reset and Ground.Here’s a page with some good info on the subject. … Read more
Although the question mentions Arduino, the following suggestions apply basically any time VSCode tells you to “update your includePath”. What is includePath? The includePath is an attribute in c_cpp_settings.json, which is in the .vscode folder of the main folder you have opened in VSCode using File → Open Folder. You can edit c_cpp_settings.json directly, but … Read more
Standard C++ for Arduino might be an option. It lets you use the STL vector in Arduino.
Start by acquiring a large A3 sheet of paper, find a red pen and write 1000 times I will never use delay as a substitute for reading and parsing responses from a modem. I will never use delay as a substitute for reading and parsing responses from a modem. I will never use delay as … Read more
I asked a very similar question at the tigsource forums. Hashing At least in games, a hash function could probably do what you want. You could do it like this class ReversibleRNG { int x; public: ReversibleRNG(int seed) : x(seed) {} int next(){return yourFavoriteHash(++x);} int prev(){return yourFavoriteHash(–x);} }; Reversible linear congruential generator (lcg) As multiple … Read more
Let’s forget the math and try to solve this intuitively. First, if we want to map input numbers in the range [0, x] to output range [0, y], we just need to scale by an appropriate amount. 0 goes to 0, x goes to y, and a number t will go to (y/x)*t. So, let’s … Read more
General note about your handling of AT commands. No, no, no! This way of doing it will never work reliably. You MUST wait for the > character to be received before sending “text to send”. Or actually it is not just the > character, it is four characters. Quote from 3GPP specification 27.005: the TA … Read more
I recently bought some extremely cheap (5 for $10.00) HX 711 boards. I noticed the same thing that you did; value drifting upward. I checked the on board load cell power supply and it seems to be defective. The band gap reference voltage (VBG) which is supposed to be 1.25 volts is actually 1.9 volts, … Read more