![]()
#Mit app inventor emulator not connecting mac androidFor further details see Turning a LED on and off with an Arduino, a HC-06 and AndroidĪssuming I understand correctly, you want to have the Arduino control the LED and then show the LED status in the Android app. #Mit app inventor emulator not connecting mac codeThe rest of the code is the same as the previous example. When a new connection is made the mac address of the newly connected BT module is saved to the TinyDB. The BT_BUTTON allows for new connections, when it is clicked it activates the list picker and allows the user to select another device. The function also checks that Bluetooth is turned on before trying to make a connection. If the connection is not successful an error message is displayed. If a connection is successful the BT_BUTTON text is changed to “Connected”. It is here the app tries to connect to the saved Bluetooth address. When the timer fires, the Clock1.Timer function is called. If the connection blocks are all placed in the Screen1.Initialize function, the connection process works but the screen is not updated correctly and the “Connecting” button text is not displayed. ![]() ![]() I use a timer to overcome a minor annoyance caused by how app inventor works. If there isn’t a saved address the variable is set to “” and the timer is not started. This retrieves the saved Bluetooth address from the TinyDB and copies in to the global variable “savedDeviceAddress”, it then starts the timer. When the app starts, the Screen1.Initialize function is called. There are only a few screen elements to note:Ī button to activate the connection process.Ī list to store the list of paired devices.Īnd of course the Bluetooth client. ![]() – If the connection is successful the BT button will show “Connected”. – While trying to connect the BT button will display “Connecting”. The next time the app is run it will try to auto-connect to the saved device. – The address of the connected BT device is displayed on screen. – If the connection is successful the BT button changes to “Connected”. – Select one of the paired devices, in my case the HC-06. – Click the BT button to bring up a list of paired devices. The first time the app is run there is no saved address and the app waits for the user to make a connection. By saving the address every time a new connection is made the user can change Bluetooth modules with ease. ![]() Then, when the the app is run again it can use the saved address to auto-connect to the Bluetooth module. This makes it very difficult to use a different Bluetooth module.Ī better way is to allow the user to connect to any BT module and then save the address for next time. This is quick and easy but it means the mac address for the BT module is hard coded in to the app and to change the address you would need to change the app and recompile. Since the Screen1.Initialize block runs automatically when the app is started, the app would try to make the connection every time it started. The easiest way to add an auto connect would be to use a fixed address and put the connection function call in the Screen1.Initialize block. #Mit app inventor emulator not connecting mac how toSee Turning a LED on and off with an Arduino, a HC-06 and AndroidĪ few people have asked how to make it so that the app auto-connect to the Arduino on start up and I thought I would offer my solution. In a previous post I showed how to connect an app inventor Android app to a Bluetooth module connected to an Arduino to control an LED. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |