Arduino / ESP32 Squarewave generator with Resistance meter and Android logger

$30-250 USD

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약 4년 전

$30-250 USD

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Proof of concept basic version with following features ESP 32 Unit that allows the following measuring cycle: Measure for 2 seconds average resistance A then Generate on same wires 50 Hz Square wave with 90% duty cycle for 5 sec Measure for 2 seconds average resistance B then Generate on same wires 50 Hz Square wave with 10% duty cycle for 5 sec Measure for 2 seconds average resistance C Calculate the following 2 values A divided by B and C divided by B and send to android with timestamp PLUS Basic Android app should have a button to start the above cycle and log the above two values with a timestamp and note NOTE : Resistance has to be measured between 5kOhm and 50 MOhm - only relative values no absolute calibration required) Square wave should be adjustable with little potentiometer 5-20 V p YOU make a Prototype and send to ship to me - I will pay material and shipping cost with a separate milestone If this is successful you will get several follow-up projects to refine the product and make it produceable Please make a quote that you want to work for - not just a dummy number and then ask me WHAT IS YOUR BUDGET - all details are here - lets not waste our time with Hi- how are you - just let me know if you have some questions about details so I see that you actually read my project outline

Android

Arduino

Electronics

프로젝트 ID: 25310239

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프로젝트를 수여된 사용자:

@ircrashed

Hello I have got your job posting and I am very much interested to work in your project. . For more on my skills and successfully finished projects, please have a look on my Profile and Portfolio. I am always available on Email and Skype. Please have a voice or video chat if necessary. I shall be available round the clock and able to start your project as soon as possible according to you. Thank you for your consideration, Best Regards, Haseeb Shafqat

$200 USD 7일에

4.8

(59 건의 리뷰)

5.9

13 이 프로젝트에 프리랜서들의 평균 입찰은 $208 USD입니다.

@hemedmechanical

Hi, i want to know where are these resistances to measure come from , a resistive load connect to the ESP32 or what if thta's the case, then we need two resistors, one with known value, one with unknown value connected to form divider network with middle point connected to one of analog pin of the ESP32 so we have 3 networks here for A,B and C to get square wave of 5-20V you need transistor as a switch as ESP32 voltage level signal is only maxed at 3.3V we can add potentiometer to adjust the output voltage level and yes we can get 50Hz with your specified duty cycles i will design android app that auto connect to the ESP32 over Bluetooth BLE, logging all the required data with timestamps, app having start,stop buttons my fee is $150 on ESP32 side and $100 on app side

$140 USD 7일에

5.0

(27 건의 리뷰)

5.0

@pranavsharma2504

So refreshing to have a to-the-point project description! Check my milestones for a breakdown of the quote. What you described is definitely doable. One thing you did not mention, though, is whether you want to have a PCB designed and assembled for this, or just a prototype thrown together on prototyping boards. Get in touch on chat, so we can discuss that, and a few other tiny details, plus your timeline. I have pretty much everything required for this project in my lab, so I can deliver in a much shorter time than quoted.

$290 USD 10일에

4.9

(16 건의 리뷰)

4.8

@danish2051

Hi I am an expert with more then 6 years of experience in embedded systems, Iot, automation, pcb design and dovelopment and prototyping. I have hands on experience in esp32, arduino, pic, arm, raspberry pi and other mcu. Thanks

$333 USD 15일에

4.7

(17 건의 리뷰)

4.3

@revorupt

Good Day! A rought timeline is mentioned below. I am a Embedded Systems Engineer based here in the Philippines. I have been doing microcontroller projects for the past 6 years now. Most of the time I use arduino as well. I am meticulous and make it a target that all objectives of the project is met within the time limit. I Hope to work with you soon! Cheers! Here is my rough timeline 3 Days - Procurement and Shipment of Components(due to lockdown might take sometime to buy components nowadays) 1-2 Weeks - Production of POC Version with Testing and Android App Milestone Breakdown Android App - $100 Arduino Code - $100 Working Prototype -$200

$200 USD 7일에

4.8

(22 건의 리뷰)

4.0

@edi45

Hi I am embedded systen engineer with 7 years of experience and i have esp32 with me. I can generate waveform with adjustable amplitude. If you dont need andoid logger. I can do it for $150 but with android i can make it within $250. Please let me know if you are interested

$250 USD 7일에

5.0

(7 건의 리뷰)

4.0

@preetpalsingh33

hello sir, how are you. I read your proposal and i am interested in this project. I am an Embedded engineer (arm, pic, AVR, Arduino, SOC ble chips, ZigBee, WiFi, GPS, LED, LCD display etc.) and PCB designer. You can check my profile for more information. I can do this project as per your requirement. I will tell you the exact cost of the project after discussion with you and i told you approximate cost of this project. I hope you will consider me for this project. I am waiting for your reply...... thanks with regards Preetpal Singh

$130 USD 7일에

5.0

(9 건의 리뷰)

3.6

@GoodCooper

Dear, client. I just read your request carefully and your request will be done within few days. I have rich experience in ARDUINO, ESP32, ESP8266 and Raspberry PI with multi sensors including PSI sensors, PIR sensors, flow meters and temp & humidity sensors, which is necessary for your project. Furthermore, I had developed GPS, GSM ,Home seer system and a lot of IOT & web applications, this will be useful for your project. If you want to hire me, we can talk further about the request and start as soon as possible. I'm looking forward to hearing from you. Best Regards. Thank you.

$400 USD 10일에

5.0

(3 건의 리뷰)

2.9

@teknoteam

Hi and good morning, IMHO some details are missing, like which precision do you need to archive in measuring ? Is a "pure" resistor or has an inductive/capacitive component ? How do you get "timestamp" , with an Internet connection toward NTP or you need an RTC on board ? Thanks for reading, Alex.

$250 USD 30일에

5.0

(4 건의 리뷰)

2.3

@agerald61

Hello You have a very serious requirement that you want at 20V square wave to travel on the "SAME" lines connecting the resistors to be measured. Still I can find ways to multiplex the line between the two signals. Another point is that you did not specify your main power source, to precisely design the power state of the system. I have used the ESP32 to accurately measure the resistance of RTD sensors in previous projects. Generating the square wave is not an issue either. I can see probable source of instability in this design, anyway we can talk about it later. My bid value covers producing a full working prototype all together with Android app. I have the parts and ready to start working on the project. Moreover I have a CRO to ensure that the circuit is generating the right frequency. It would take 5-7 days to have a working prototype. Then I will need to manufacture the PCB and assemble it and ship to you. Shipping delays due to COVID19 should be considered. Best regards.

$200 USD 7일에

5.0

(1 건의 리뷰)

2.1

@bilalrazafcb

I have read your requirements I can do your work easily as i have handled this before I have experience in arduino from 5+ years and made several projects on it I also have hands on experience on PCB designs I can assure you quality work on deadline You can check out my portfolio for my sample Kindly send details if you are interested Thankyou :)

$170 USD 5일에

0.0

(0 건의 리뷰)

0.0

@yassineaboudrar

hi sir I’m new in this platform and I really need to get started you will be my first client I’m going to assist you step by step trout this project intel you get your project working

$100 USD 7일에