It`s free
By default, the TinyWebDB component stores data on a test service provided by App Inventor, http://appinvtinywebdb.appspot.com/ . This service is helpful for testing, but it is shared by all App Inventor users, and it has a limit of 1000 entries. If you use it, your data will be overwritten eventually.
borrar_tinywebdb.aia (1.9 KB)
i know tinywebdb itself is free but your previous link contained a tutorial thing were i needed it to continu with the tutorial.
but I don't think it'll work because you can only store some information once right, so if i store 1 sequence of data the next one would overwrite it right and would't all data of all participants cross each other anyway?
due to time i'm gonna make it so that you need to send your name to the arduino and store that on a SD card before the training begins, we have a SD card to store our generated energy eitherway, i just didn't want to do it in the first place because it's not really that efficiënt if you know what i mean.
i'll keep trying to find how it works since i'm really curious now how it works but just in case i can't make it work that's the backup plan for now. but i think if i didn't make it work i will invest some more time even after the project.
That does not happen unless you code it to, but the main stumbling block with most Cloud solutions is that they have to be paid for. You cannot reliably use the free MIT App Inventor WebDB service for anything other than testing as the db is overwritten by others.
What you can do is implement a Cloud you already have - such as Google. That would allow you to demonstrate how your App works. I'm sure no educational establishment is going to expect you to sign-up for an expensive online service that would be used if the App were commercial with thousands of Users.
Both Google Drive and Google Sheet are in TimAI2's guides:
I made a button and what i want is to not send anything if the textbox doesn't contain text, this is the block i made with it so it doesn't do anything unless you fill in your name into the textbox.
This is the part in my code were i check if indeed bluetooth is connected, then when data comes in it puts it in the name string and sets namereceived to true then i can progress with the program.
while (BTConnected == true)
{
if (Serial.available() != 0)
{
Name = Serial.readString(); // read the name send
NameReceived = true;
}
while (NameReceived == true && SDerror == false && Systemerror == false)
but now if i don't put in my name it for some reason still sets the namereceived to true.
i thaught i countered it with the block text cannot be "" but that apperently doesn't do it.
my question is how can i optimilize it so it wi'll work the way i want, because now it thinks to soon that i received a name.
Use this block
instead of that
does anybody know why this keeps happening, i've installed aiStarter multiple times, did all the steps as explained but the reset after installing the phone things doesn't work and after that if i try another connection it keep doing this.
i want to use the emulator for my demo video, so i can capture my serial monitor and the app in the same screen and paste another screen next to it where i demonstrate what i'm doing (when i push buttons for example).
Consider using a different emulator than the stock MIT AI2 emulator, which is outdated.
I am currently using MemuPlay, and the Connect to Companion option. That doesn't use aistarter.
