Schematic Design For esp32
I want to create a schematic design for a esp32 module with MPU6050 chip as well as a battery connector and a battery charger, it is similar to link text but i want to use the esp32 module not the chip.. i have already achieve this using the esp32 dev board and MPU6050 board and a battery charger as per the picture below(couldn't attach a zip file) but the issue is the battery consumption is very high and the size is very big also...
This will be my first time trying to make my own device(Schematic) i am good using the boards and connecting them but not joining ICs on a PCB.. please any help on how to achieve this will be welcomed..
salmanfaris last edited by
Hi @ZeeZa ,
You need to build a custom board with the ESP32 SoC and the MPU6050 IMU, right?
first, you need to select appropriate ESP32 SoC from the wide variety of model, after that using the datasheet find out the minimum configuration circuit for the SoC and add the MPU6050 module. that's all you need. the most tricky part is the minimum configuration circuit.
@ZeeZa I'm working on a similar type of project. As @salmanfaris has mentioned the minimum config of ESP32 is important. But, If you are trying to use the SoC versions like ESP32 WROVER then you can directly interface it with MPU6050 IC. If you're trying to use bare IC instead of the breakout board of the MPU6050 then I suggest you see this link which will give you the configuration to be made for the MPU6050 IC to interface with your MCU.
I suggest you to even look at the datasheet of the ESP32 because they have mentioned how you must place the SoC module on PCB. You cannot place the module in the middle of the board as it causes bad reach to the antenna. The SoC must be placed at the edges of the PCB with antenna side protruding outside. There are many other design rules mentioned in the datasheet. So, Please refer it before you start your work. All the best, happy making..!!
Thanks for the replies.. so far i have been able to achieve this link text but i am having so doubts when following the datasheet of link text page 15 here is the image , I do not understand what the JP3(Jtage) is for, can someone please explain, also i have this other link link text he did the same thing am doing but way more than mine. so i am following some of his schematics. also i have a lot of unfinished net in my schematic please how do i deal with them... Thanks
kowshik1729 last edited by kowshik1729
@ZeeZa JP3 in the schematic means Jumper slots for JTAG connections. jtag is nothing but an IEEE standard used for programming and debugging the microcontrollers. It is more sophisticated than other protocols so far. So, In order to program your MCU with the code that you write on your IDE, we need these pins for burning the code. You can even burn the code in prior and populate the SoC onto your PCB. But, it's more recommended to make these JTAG connections so that you can program it whenever you wanted.
i am trying to make the pcb as slim as possible here and adding the jumper will make it a little bigger width wise, i thought the the UART(JP1) is for uploading the code to the esp module as it is connected to TXDO and RXDO or is it only serving as a power connect in this schematic?
@ZeeZa The JP1 UART jumper doesn't serve as the power connect. It is meant for extending the UART pins so that you can access them. JTAG is responsible for uploading the code and I understand that you are not ready to compromise over the size of PCB. So, I suggest you use CP2102 USB to UART converter where you can just connect your mini USB cable and upload the code. This is even easier, but if you see the ESP32 development module, it is just the same board where ESP32 SoC is fit which can be accessed with a USB to UART converter.
You can use these
for extending the JTAG pins. These are a little small and can reduce the width of the PCB. Please let us know in case of queries. You ca easily find the footprints of these connectors in your PCB designing softwares.
am sorry if i am asking some basic question i still cant get my head wrap around the JTAG pins, let say i have the JTAG in my pcb how will i use the pin to program the device from my Laptop(IDE) or is the Jtag used the same way we use the ESP-01 which we connect to Arduino UNO rx and tx pin before we can upload the code on it?
You can programme your board using the JTAG pins on your PCB by connecting them to the JTAG pins of the programmer board.
kowshik1729 last edited by salmanfaris
May be this might help you out..!! Please try out and let me know your output.
@Anudeep Thanks a lot m8, I actually made a very silly mistake of including the https:// while entering FIREBASE_HOST, where I must have entered the Domain name alone and removed the https:// extension.
Thanks again for replying that quick. Cheers.
Hello @Palani, In the Firebase, there are two types of storage,Cloud Firestore (Very recent one & NoSQL database) Realtime Database (To which we upload the data using NodeMCU)
In the Arduino Code, you can see that there is a variable named FIREBASE_AUTH.
This variable should be assigned to the Database secret. This you can find in Project Settings -> Service accounts -> Database Secrets.
My mistake is, i have mistakenly assigned thay to Web API key. This is found at Project Settings -> General.
The error can also occur when u don't initialise a proper realtime database in Firebase. (This is not my case).
@Anudeep Hello Anudeep could you please help me out by elaborating the fix to get rid of that error?
Thanks in advance.
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@kowshik1729 If you are using an external high-speed switch, there is only one one clock generator for both wifi and BLE and the high-speed switch you mentioned is Ultra-Wideband (UWB) 3–8 GHz from its datasheet
you also check this solution that I shared in the previous post.
There is a special option called “Software controls WiFi/ Bluetooth coexistence” it can control the ESP32's Bluetooth and Wi-Fi coexistence using software, more details: https://www.espressif.com/sites/default/files/documentation/ESP32_FAQs__EN.pdf