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)

Beceriler: Elektronik, PCB Düzen, Mikrodenetleyici, Elektrik Mühendisliği, Arduino

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İşveren Hakkında:
( 0 değerlendirme ) Pellenberg, Belgium

Proje NO: #29896152

Bu iş için 19 freelancer ortalamada €1317 teklif veriyor

(81 Değerlendirme)

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 Daha Fazla

€1000 EUR in 2 gün içinde
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(67 Değerlendirme)

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 Daha Fazla

€1125 EUR in 15 gün içinde
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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 Daha Fazla

€2500 EUR in 15 gün içinde
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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 Daha Fazla

€1400 EUR in 20 gün içinde
(8 Değerlendirme)

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 in 7 gün içinde
(6 Değerlendirme)

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 Daha Fazla

€1400 EUR in 15 gün içinde
(1 Yorum)

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€1350 EUR in 30 gün içinde
(2 Değerlendirme)

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 in 7 gün içinde
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(12 Değerlendirme)

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 Daha Fazla

€2000 EUR in 15 gün içinde
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€1500 EUR in 30 gün içinde
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€750 EUR in 30 gün içinde
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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 Daha Fazla

€750 EUR in 7 gün içinde
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"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 Daha Fazla

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