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AVR Firmware Development

$100-400 USD

Completed
Posted over 8 years ago

$100-400 USD

Paid on delivery
I need something similar to the attached document to get ohm readings from a water probe. However I don't need datalogging or temperature readings. I just need the device to behave like an I2C slave and reply to requests with the calculated ohm readings. As in the schematic in the document there will be two probes. Attiny441 /841 or Attiny24 would be preferred but other avr devices could be used if needed. Please contact me with any questions.
Project ID: 9206455

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22 proposals
Remote project
Active 8 yrs ago

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Hi, I have experience for 15+ years in electronics/embedded development. I have several years of advanced AVR/arduino development, including library development from scratch. Also developed several projects in tools from Atmel like AVR Studio and Atmel Studio. Practically all Arduino boards used, like: 2009, 2010, UNO, MEGA, NANO, MICRO, MINI and others like DigiSpark (attiny85) and DUE (ARM Cortex-M3). By your project description, I couldn't understand if you want the exact PDF TDS system implemented or you just want an AVR attiny device answering to I2C requests (slave) reporting an analog value that would be further processed in the I2C master device after reading those values. This bid is for the second case - I2C slave device reporting an analog input. For the full system in the PDF, project cost/time would have to be further discussed/adjusted. What I propose is using an attiny85 AVR microcontroller for hardware, as I have several development boards with it (Digispark) and arduino IDE with digispark support for software toolchain. I would deliver an I2C slave device with an analog value being answered with or without averaged/aliased values. If you are interested in my bid, please let me know some more details about your project and I'll be able to answer you back telling if I'm up to the task or not. Best regards, Carlos.
$150 USD in 5 days
5.0 (22 reviews)
5.9
5.9
22 freelancers are bidding on average $284 USD for this job
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Hi, I hope you are doing well. I have expertise in this field. and I would like to discuss in more depth. Looking Forward, Khawaja
$263 USD in 3 days
4.8 (85 reviews)
7.1
7.1
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A proposal has not yet been provided
$526 USD in 7 days
4.9 (62 reviews)
7.0
7.0
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If you wanted the system to be developed using PIC12F1822 then I am here. Its very fast MCU and literally run without any external components. Its cheaper than ATtiny441 also. But I am not sure if you want to incorporate other features, because its 8 pin device and will be limited to just the probe and I2C interface. I have this MCU in stock and can also do some basic level testing once the firmware being developed. I do have 100MHz digital scope too so testing the waveform on different kind of waters will be done as well. Its internal EEPROM will hold the calibration according to your probe architecture. It would be an interesting job indeed. Thanks and please let me know. Regards...Roy
$388 USD in 15 days
5.0 (75 reviews)
6.7
6.7
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Hi... I have 6+ years of experience in the field of electronics. I am working on different industrial based project where my primary role was to design embedded system, programming of micro-controller, system implementation. You can check out my portfolio for my work information and my qualification. I have worked on more then 55 projects based on different platform including live tracking device(IOT), heartbeat monitoring system, Android operated chemical detection robot for pharma industry, autonomous robots, cap sense based home automation system, Industrial chiller controller, GSM security system and many more. Expect your work done within deadline with best quality..... Question:- 1) there is no document attached? 2) Do you require PCB designing and firmware both or only firmware? 3) If you require prototype ready then i can shipment it from here? but you need to conform that and have to pay shipping charge. Please let me know any thing you need to know in personal message. And please message me detail requirement of your project, so we can discuss on it.... Thank You
$244 USD in 3 days
4.9 (54 reviews)
6.3
6.3
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Hello, I have a lot of expierence with AVR. I basically they are used in measuring instruments. I use the gcc and other compilers.
$277 USD in 3 days
4.9 (48 reviews)
6.5
6.5
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$222 USD in 10 days
5.0 (16 reviews)
5.5
5.5
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I have over 35 years experience as an electronic design engineer, please see my profile for more details The current price and timescales are only place holders to allow me to communicate with you The measurement technique you have highlighted using charge / discharge methods is extremely crude and will only provide limited accuracy after calibration in similar water conditions. Please have a look at application note CN0359 Using this accurate method you get away completely with no calibration required. Either way I could design a solution for you although I would base the solution around a PIC micro controller that would behave as an I2C slave If you think I can help then please come back to me. Best Regards Dave Lelievre
$388 USD in 10 days
5.0 (10 reviews)
5.2
5.2
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Hello, I'm AVR programmer. I can write this for Attiny441/841/24. Right now I have Attiny24A and can begin work. If you have some questions - I'm ready to give an answer.
$200 USD in 5 days
4.8 (13 reviews)
4.6
4.6
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Hello, I have been working on embedded system for 2.5+ years. Expert in avr, Raspberry Pi, Ardunio. I would like to work on this project, and please let me know if you want to start with me. Thank you!
$277 USD in 3 days
4.7 (11 reviews)
4.3
4.3
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Hi, I have read the document and this is something that I can do this. I have an experience of 4 years in working with AVR controllers, ATmel Studio and Arduino environment. I want to ask some queries. So I hope for your response. If you are interested, then kindly reply back. If you have any doubts, then feel free to contact and we can negotiate for price and timeline too. Waiting for your kind response.
$333 USD in 12 days
5.0 (3 reviews)
3.7
3.7
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Hi, Trust you are doing well! :-) I am a well experienced embedded software developer (5 years of experience). I have delivered previous projects on time and with 100% satisfaction. Kindly check the reviews on my profile page: https://www.freelancer.in/u/kaush9287.html#/reviews Please get in touch to discuss further details. I would specifically like to know the final schematic we would be using in this project. Be rest assured that your work will be done with best quality and will be delivered on time. Hope to hear from you soon! :-) Best Regards, Kaushal
$150 USD in 7 days
5.0 (10 reviews)
3.7
3.7
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hi i can help you with my extensive professional experience in electronics design & development. i have done similar project before, believe in quality work. contact me and send me details.
$388 USD in 3 days
5.0 (1 review)
2.9
2.9
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Hello, I have experience in firmware development, microcontrollers and serial interfaces like I2C. I can develop this firmware for you by using a attiny development board. By the meantime, you need to send water conductivity probes because I can't find in my local market. Best regards, Cumali Ceylan
$277 USD in 3 days
5.0 (1 review)
2.4
2.4
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hi.......... I am interested in this assignment. As have sufficient knowledge of AVR microcontrollers. thanks and regards inder
$216 USD in 5 days
4.0 (1 review)
0.5
0.5
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A proposal has not yet been provided
$166 USD in 3 days
1.0 (1 review)
1.7
1.7
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A proposal has not yet been provided
$222 USD in 3 days
0.0 (0 reviews)
0.0
0.0
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A proposal has not yet been provided
$277 USD in 7 days
0.0 (0 reviews)
0.0
0.0
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We have completed lots of this type work with 100 % accuracy and also worked on I2C based interface.
$388 USD in 25 days
0.0 (0 reviews)
0.0
0.0
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Hello, I am from electronics background. Have hands on experience on C coding, Embedded firmware development, MBD. Hope for positive reply. Regards, Vishal
$166 USD in 3 days
0.0 (0 reviews)
0.0
0.0

About the client

Flag of UNITED STATES
S. Lake Tahoe, United States
5.0
78
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Member since Aug 24, 2006

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