# Environmental control chamber **URL:** \ **Category:** Jobs and Paid Consultancy\ **Created:** [February 28, 2025, 12:47am UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737 "2025-02-28T00:47:48Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![goldenclover](https://avatars.discourse-cdn.com/v4/letter/g/7ea924/32.png) [@goldenclover](https://forum.arduino.cc/u/goldenclover)\ **Post date:** [February 28, 2025, 12:47am UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/1 "2025-02-28T00:47:48Z")
Job is to code functionality for controlling peltier coolers and their fans, to adjust temperature and dew point within a container. Additionally it should record data to an SD card, as well as a web portal where settings can be adjusted. Hardware is: Metro M4 Airlift Lite + Data logging shield 2x HDC3022 IOTMUG 8-channel relay 4x Peltier cooler + fan Circuit is complete and i have a manual that outlines functionality goal as well as some loose code that can be used for reference. Price negotiable, should be pretty straightforward. ---
**Author:** ![Paul\_KD7HB](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/paul_kd7hb/32/1127958_2.png) [@Paul\_KD7HB](https://forum.arduino.cc/u/Paul_KD7HB)\ **Post date:** [February 28, 2025, 12:53am UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/2 "2025-02-28T00:53:05Z")
> [@goldenclover](#): > > IOTMUG 8-channel relay What part do the AC SSR devices play in your project? ---
**Author:** ![goldenclover](https://avatars.discourse-cdn.com/v4/letter/g/7ea924/32.png) [@goldenclover](https://forum.arduino.cc/u/goldenclover)\ **Post date:** [February 28, 2025, 1:02am UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/3 "2025-02-28T01:02:42Z")
Just to send power to the peltier coolers and fans. Since theres 4 coolers and 4 fans the 8 channel fit perfect. Basically sensors report temp and dew point etc and based on readings we have coolers turning on and off. The fans really are tied to the coolers just with their own power. I hope that clarifies. ---
**Author:** ![Paul\_KD7HB](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/paul_kd7hb/32/1127958_2.png) [@Paul\_KD7HB](https://forum.arduino.cc/u/Paul_KD7HB)\ **Post date:** [February 28, 2025, 1:15am UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/4 "2025-02-28T01:15:47Z")
> [@goldenclover](#): > > Just to send power to the peltier coolers and fans. So what Peltier coolers are you referring to? The ones most people use are operated on DC. ---
**Author:** ![goldenclover](https://avatars.discourse-cdn.com/v4/letter/g/7ea924/32.png) [@goldenclover](https://forum.arduino.cc/u/goldenclover)\ **Post date:** [February 28, 2025, 2:03am UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/5 "2025-02-28T02:03:46Z")
Sure, I pulled them from a small dehumidifier fed on a 9.0v/2.5A plug that I used to power the cooler and fan during testing. As to your question of AC vs DC, im unsure when I was looking for an I2C relay this one popped up first and when I wired everything up it worked. ---
**Author:** ![Paul\_KD7HB](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/paul_kd7hb/32/1127958_2.png) [@Paul\_KD7HB](https://forum.arduino.cc/u/Paul_KD7HB)\ **Post date:** [February 28, 2025, 5:47am UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/6 "2025-02-28T05:47:27Z")
A nice picture of your project would really help with understanding it. A schematic or block drawing of all pieces and connections, as well! ---
**Author:** ![zwieblum](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/zwieblum/32/427702_2.png) [@zwieblum](https://forum.arduino.cc/u/zwieblum)\ **Post date:** [February 28, 2025, 7:31am UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/7 "2025-02-28T07:31:59Z")
... ant just maybe the planed budget 🙂 ---
**Author:** ![goldenclover](https://avatars.discourse-cdn.com/v4/letter/g/7ea924/32.png) [@goldenclover](https://forum.arduino.cc/u/goldenclover)\ **Post date:** [February 28, 2025, 2:16pm UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/8 "2025-02-28T14:16:00Z")
Im not sure what a freelance python coder should make I figured we would work it out if someone was interested. Its a pretty simple project I imagine would take someone with some experience with Arduino a few hours tops. ---
**Author:** ![bobcousins](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/bobcousins/32/221530_2.png) [@bobcousins](https://forum.arduino.cc/u/bobcousins)\ **Post date:** [February 28, 2025, 2:17pm UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/9 "2025-02-28T14:17:29Z")
Arduino is generally programmed in C++. Is your requirement for Python code? ---
**Author:** ![goldenclover](https://avatars.discourse-cdn.com/v4/letter/g/7ea924/32.png) [@goldenclover](https://forum.arduino.cc/u/goldenclover)\ **Post date:** [February 28, 2025, 3:05pm UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/10 "2025-02-28T15:05:04Z")
Sorry, CircuitPython is just what I started with, I can \*understand code significantly better than executing so any language available to arduino is more or less fine. ---
**Author:** ![Paul\_KD7HB](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/paul_kd7hb/32/1127958_2.png) [@Paul\_KD7HB](https://forum.arduino.cc/u/Paul_KD7HB)\ **Post date:** [February 28, 2025, 3:57pm UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/13 "2025-02-28T15:57:02Z")
> [@goldenclover](#): > > I am currently on a time table however, which would probably make sense why I came here and not a troubleshooting forum dontcha think? If you have not found anyone to help, by now. It would be much faster to do it yourself. At least you could test as you developed the code. ---
**Author:** ![goldenclover](https://avatars.discourse-cdn.com/v4/letter/g/7ea924/32.png) [@goldenclover](https://forum.arduino.cc/u/goldenclover)\ **Post date:** [February 28, 2025, 3:59pm UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/14 "2025-02-28T15:59:12Z")
Sadly just not that good at coding, great at the physical part. Anyway, the real gift was in the DMs. Thats where all the people who actually want to make money showed up hah ---
**Author:** ![PerryBebbington](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/perrybebbington/32/238766_2.png) [@PerryBebbington](https://forum.arduino.cc/u/PerryBebbington)\ **Post date:** [February 28, 2025, 9:26pm UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/21 "2025-02-28T21:26:27Z")
I've deleted some replies, keep it polite please. If you are interested in @goldenclover 's project please continue to discuss, if you are not interested then there's no need to reply. Any more comments like the ones I deleted are likely to result in a short break from the forum. ---
**Author:** ![cedarlakeinstruments](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/cedarlakeinstruments/32/1128931_2.png) [@cedarlakeinstruments](https://forum.arduino.cc/u/cedarlakeinstruments)\ **Post date:** [March 1, 2025, 10:08pm UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/22 "2025-03-01T22:08:51Z")
> [@goldenclover](#): > > and dew point That's the kicker. Do you have an algorithm to control humidity or is the programmer expected to derive that? ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [August 28, 2025, 10:09pm UTC](https://forum.arduino.cc/t/environmental-control-chamber/1358737/23 "2025-08-28T22:09:29Z")
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