Save Multiplex Required with airSlate SignNow

Save multiplex required

[Music] alright what's up guys I'm from brain viscom been away for a while at the summers coming and got a lot of work to do outside and I'm also redoing my workshop so I'll show you that very soon today we're going to look at a way to use multiple I to see modules that share the same address and what I mean by that if you look at these modules here we've seen this one in this one this is the LCD BacPac and this one has dip switches to actually change the i2c address in case it would conflict with this one this one has little pads that you can solder now if you look at the DS screen we've used these screens before they're very popular if you switch them around there's nothing in there to actually change the address that's because most of these screens come with art coded iqc addresses so how do you use multiple of these using an Arduino let's say you want to have player scores 1 & 2 and they share the same address you're gonna need a board called an i2c multiplexer so that's what we're gonna look at today so let's go look at the code and then we'll test it out and we'll be right back all right so let's go quickly to through the code we're gonna use today we're including the libraries at the beginning that we're going to use and then we're defining the address of the i2c multiplexer by default it's at the 0 X 70 and if you look on that board it has three pins a 0 a 1 and a 2 those if you don't connect anything there they're low by default and that gives us this address right here but you can put them high and play around with it to change the address I think up to 77 so that's the way you would change the address on that board then we have two tech switches one will select which OLED we want to work on work with and the other one will increase a counter on that selected OLED and then a couple of variables to keep track of stuff and here we're initializing the multiplexer library using the 0 X 70 that we put here a couple of variables to keep track of counters and here we're initializing each OLED display using I to see but if you look here it's not an address it's because most of these jewels that have fixed address the address is fixed at 0 X 3 C so the UHG library knows this and it's hard-coded inside a file of this library now if you're using a different OLED display that doesn't have that particular address you're going to need to edit a file inside the library so we're gonna go check out which file you need to edit and then we'll be right back alright so if your modules that you're using the Odyssey modules you're using don't have the default address of 0x trees see you will have to edit this file inside the UHG library and here's the path where you will find the file and the file is UHG underscore co m underscore i - c dot c so you open that to edit and then it's near the end of it you'll see it here right there so at define i - c underscore SLA as you can see by default it's 0 X 3 C so you would edit that to reflect the i2c address of the modules you using save the file and then it would work so now let's go back to the code and continue alright so let's continue with the code each one of the tax switches uses input pull-up resistors on the Arduino I've made a video on that if you want more information on how this works you can check it out right there if you need to rotate your display 180 degrees you just uncomment this line right there and I'm selecting which font I'm gonna use on each one of the OLED displays and here is where we're starting to use the i2c multiplexer board where I'm switching to bus 2 and if you look on the board there's 8 buses numbered 0 through 7 now I'm switching to bus 2 which is where my first OLED is connected and I'm setting the brightness to 100 in this testing we'll see I'm changing the brightness to indicate which one is being selected so if it's bright it's selected if it's dimmer it's not so now I have this selected and I'm gonna put some stuff on it at the beginning Dan when it's done I'm gonna switch to bus 7 which is where my second hole that is connected putting the brightness to zero or dim and then displaying stuff on that OLED now once it's finished I'm switching back to bus 2 so basically the way it works when you switch to a bus it kind of makes a direct connection between your Arduino and module that's connected to that bus so every time you send I to see commands it will send it directly to that module on that bus and then we get to the main loops so if I click the text which to select between all adds it's going to check first which OLED it is on right now it's going to set its brightness to zero so dim it down from a hundred then I'm switching to the number 7 bus and putting the brightness up on that one now if it's the other way around it will do the other way around here last thing is that if I click the text switch to increase the counter its checks which OLED is selected now it's going to increase the counter for it and display that information and if it's the second one or the other one it's going to increase that counter for it and display the information right there so there you go that's the whole code so let me upload that and let's go test it out all right so here's the setup we have our you know we have the i2c multiplexer right here and we have our two OLED screens right there they share the same address like we talked about and this is to select which one we want to use and this is to increase the counter so let me plug in to you now and test it out all right there we go oh if you can saw on camera with this one is brighter and this one is a little bit dimmer so if I press this one then this one is brighter so that's the one we're gonna use first so let's increase the counter a little bit and there we go that works so let me select the other one this one now is brighter and I'm controlling the counter on this one and so on and so on and I can go between them as I want alright so there you go guys if you have iqc modules that share the same address and they are fixed that means that you can't change them then using the i2c multiplexer here enables you to use multiple of these guys if you want up to eight of them so hopefully that helps now let's go back to the main camera and wrap things up alright so they'll do for today guys hopefully you found this interesting don't forget to check out my website if you want more information I have the libraries use and code if you want to copy and face and a little bit more information if you want it also I'm gonna be working a lot in the workshop this summer so I'm gonna try to bring you guys along on what I'm working on and make videos along the way and yeah so I have a bunch of other project coming up as well so as always my name is Ivan and hope to catch you guys real soon take care [Music]