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ESP32-WROOM-32D analog measurements and Android application

Two independent ESP32-WROOM-32D or other brand BLE module analog measurement devices (BLE servers) do need to communicate the measurements with an Android smartphone.

Spec. ESP32 or other brand BLE module measuring device 1 and device 2

PCB dimensions max 30x35mm exclusive the analog device, preferable smaller.

PCB has two solder points for analog device. (Force sensor)

ESP32 or other BLE module on one side of PCB, CR2032 coin battery on other side. Battery is horizontal on PCB on "lid side" of housing.

ESP32 or other BLE module is using "wake-up" touch pin. Pin comes (Not a switch) trough the PCB and trough the housing lid.

SMT LED on battery side indicates ESP32 is awake

Two layer PCB design


100% BLE protocol design (NOT generic Bluetooth design)

Server firmware

Wakeup out of deep-sleep via touch pin

BLE Deep-sleep mode after 15 minutes no analog input signal

BLE Sleep mode after 10 minutes no analog input signal. If within 15 minutes analog input starts again, the unit wakes up.

When awake, the analog input value (varies from 0 to 4095) gets communicated 10 times per second. Noise tolerance = 100

Android app:

Needs to be able to register Spec. BLE module measuring device 1 and device 2

Needs to be able to unregister Spec. BLE module measuring device 1 and device 2

After registration of each device a 3 set point calibration procedure must be performed. 5Kg, 10Kg, 15Kg

When a device get unregistered, the calibration values are deleted to.

All data including time-stamp in sequence stored in .csv format (file name [login to view URL]) after each new wakeup, a new file is created. ( [login to view URL], [login to view URL], [login to view URL], etc)

10 data points or more (max 20) per second Noise filter maybe needed

.cvt file data format is: timestamp, f1, f2, f3, f4, fn (data points per second)

Kĩ năng: Điện tử, PCB Layout, Vi điều khiển, Kĩ thuật điện, Arduino

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Về Bên Thuê:
( 0 nhận xét ) Pellenberg, Belgium

ID dự án: #29896152

19 freelancer chào giá trung bình€1317 cho công việc này

(81 Nhận xét)

Best PCB Design Expert at your doorstep! Dear Client, We can design PCB for ESP32-WROOM-32D analog measurements as per your requirements. We couldn’t stop ourselves from bidding after going through the description as Thêm

€1000 EUR trong 2 ngày
(31 Nhận xét)
(75 Nhận xét)
(67 Nhận xét)

Hi, I am an electronics engineer familiar with circuit design, multi layer and high speed signal PCB layout. In previous works I have designed the class d amplifier and some carrier board for SBCs and camera module. Al Thêm

€1125 EUR trong 15 ngày
(33 Nhận xét)

Hi, I have over 9 years of experience in embedded design and development. I have expertise in IoT product development using different wireless technologies i.e. WiFi, BLE, Cellular, GPS, Lora, ZigBee etc. I have been Thêm

€2500 EUR trong 15 ngày
(15 Nhận xét)

Hello sir, i have 6+ years of embedded and IoT system development experience. and from my experience I can tell you that esp is not a good choice for low power coin cell operations. first of all is libraries are based Thêm

€1400 EUR trong 20 ngày
(8 Nhận xét)

Hello, I have just read your job description with care. ESP-32 arduino development is my expertise area. As an expert, I am very confident to this project. Please contact me for more detail. Thank you, regards.

€1125 EUR trong 7 ngày
(6 Nhận xét)

Dear Sir. I have read your project description carefully. I have developed many ESP32 projects using ESP32. My experience in ESP32 is the following. - BlE(GATT, GAP), WiFi(Station, AP, DNS..) - ADC, Digital, I2C, SPI Thêm

€1400 EUR trong 15 ngày
(1 Nhận xét)

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€1350 EUR trong 30 ngày
(2 Nhận xét)

Hi, I am interested to help you in your project. I have good experience working in ESP, bluetooth modules and in developing Android apps. Expecting your reply.

€800 EUR trong 7 ngày
(4 Nhận xét)
(12 Nhận xét)

Dear Sir, I have experience in providing complete embedded solutions for 3years. I am skilled in programming microcontrollers like Renesas, Texas Instruments, PIC, Arduino, Espressif, and many more. I can design schema Thêm

€2000 EUR trong 15 ngày
(4 Nhận xét)

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€1500 EUR trong 7 ngày
(1 Nhận xét)

Hello. I have read your description carefully and I am very interested in your project. I am a professional electrical/electronics engineer and have actual experience in Embedded System Design based on PCB design and Thêm

€1500 EUR trong 30 ngày
(1 Nhận xét)

Hey there, I have reviewed your project description and it seems we can be a good fit for this , we are an engineering firm and have worked on some really challenging projects . As per the project description we need Thêm

€1500 EUR trong 7 ngày
(0 Nhận xét)

Hello, I am working with this kind of projects since last 6 years and I can even enhance the project and suggest you for the project improvement if needed with my experience. The charges for the pcb manufacturing and Thêm

€750 EUR trong 30 ngày
(0 Nhận xét)

Hi I have been working with ESP32 for a long time and I have products on the market. With both BLE and wifi. I have over 5 years of experience in PCB design and electronics. I can complete your project and deliver it t Thêm

€750 EUR trong 7 ngày
(0 Nhận xét)

"ESP WROOM 32D - Analog Measurement IoT Device + BLE Androide APP" Greetings to You, Please visit our profile https://www.freelancer.com/u/etrinitytech We have developed professional IoT Products for an US and Austr Thêm

€750 EUR trong 15 ngày
(0 Nhận xét)