Customer Comments

Here's the latest comments from our customers, if you've got comments that you think would be useful for others to read, you can also make a comment on the individual product or blog page.

  1. Werner van der Merwe - Sunday, 22 December 2019 on product Water Flow Sensor - 1"
    The link to the wiki doco has changed - please refer to http://wiki.seeedstudio.com/G1_Water_Flow_Sensor/
  2. Zorro - Monday, 09 December 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi,

    Can somebody to clarify pinout of CNS connector for MHI?
    According to project of Rob Dekker https://github.com/rjdekker/MHI2MQTT:
    Pin 1 (left) = 12V, pin 2 = SPI clock, pin 3 = SPI MOSI, pin 4 = SPI MISO, pin 5 (right) = GND.
    But when I looked at some recent project (which based on Rob's one) https://github.com/absalom-muc/MHI-AC-Ctrl/blob/master/Hardware.md
    pinout is different:
    Pin 1 (left) = 12V, pin 2 = SPI MISO, pin 3 = SPI clock, pin 4 = SPI MOSI, pin 5 (right) = GND.
    Personally I have SRK25ZJ-S, a board a little bit different, but it also has CNS connector. So, before try to build WIFI MQTT bridge with ESP8266 I would like to clarify pinout for AC connector.

    Thanks in advice!
  3. Neil Allison - Sunday, 08 December 2019 on product Pololu USB AVR Programmer v2.1
    I'm very pleased with this programmer which has saved my bacon after my AVRISP MkII became intermittent and unreliable.
  4. Hadley Rich - Wednesday, 04 December 2019 on product Passive GPS Antenna uFL - 15mm x 15mm 1 dBi gain
    Hard to say, it depends on the building and surroundings etc.
  5. Al Grant - Tuesday, 03 December 2019 on product Passive GPS Antenna uFL - 15mm x 15mm 1 dBi gain
    Hello,

    How good is this antenna indoors?

    Thanks

    Al
  6. Gary - Wednesday, 27 November 2019 on product SiliconDust HDHomeRun Connect Duo
    Black Friday specials on HDHomerun gear?
  7. Hadley Rich - Tuesday, 19 November 2019 on product Big Dome Push Button - Red
    Hi,

    No these aren't waterproof.

    Cheers
  8. Hello, are this waterproof ? - Thursday, 14 November 2019 on product Big Dome Push Button - Red
    Volcantrust@gmail.com
  9. David Sainty - Monday, 11 November 2019 on product Portable Laptop Battery - Voltaic V88
    Can you do this with the Fuse 10W? I.e. the current Fuse 10W combination.
  10. Just wondering... - Friday, 01 November 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi! Nice hack! I have messed about with the MSZ-FD25VA with a remote marked as KM09D and one thing in the manual baffles me:

    "After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit.The indoor unit only accept the signal from the remote controller that has been assigned to the indoor unit once they are set.The setting will be cancelled if the breaker is turned OFF, or the power supply is shut down.Please conduct the above setting once again after the power has restored."

    Does this mean that there are some type of id sent on all KM09D remotes, or does this just mean different model of a remote? I haven't found out any indication in the IR-code. What else? Oh god... different timings on the hi and low states of the pulse!? I have a working control unit which just emulates the remote, but it seems that it sometimes doesn't work as intended...
  11. Ere - Thursday, 31 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    If anyone is trying to make setting remote temperature work and just getting roomTemperature reported as 10, you might want to check out https://github.com/SwiCago/HeatPump/pull/144. This change allows things to work with my European MSZ-FH35.
  12. David Sainty - Monday, 21 October 2019 on product Raspberry Pi 3 Model B+
    No Raspberry Pi 4 in stock yet?
  13. Michal - Sunday, 13 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @TimR Having the unit turn off was my initial plan. I was just a bit worried that there might be some additional wear and tear from doing that all day. Plus I believe there is a 3 minute delay between when the units turn on and the compressor can come on again?
  14. TimR - Sunday, 13 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @Michal Really if you're going to put an esp8266 in, you could just have the unit turn all the way off when the set point is reached and not bother with the resistors. Then if your remote goes down, the unit would fall-back and work with the internal sensor.
  15. TimR - Sunday, 13 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @Michal I doubt the compressor would run forever, but yes, the fan being off, if the internal thermostat needed to be used, it's function wouldn't be optimal. Depending on where it is situated, air would get to eventually but it might not work as well. These are things to consider. I think I will put the heating resistor back on. Like you said, the heating doesn't produce the humidity and it would be good to blow the heat away from the unit when the compressor is off. I might put a switch in-line with the resistor. Then I could turn the feature on and off easier. Looking at the diagram, your control board may not have the resistors. That might be a good thing. Your fan options may be controllable through software. But they may just be labeled something different. You could try Mitsubishi Customer Care. They have given out the jumper settings to other people (they had to be persistent). Good luck.
  16. Michal - Saturday, 12 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    I've been frantically searching for JRRE but it does not appear to exist on my unit.. At least not under that name.. Or not on that control board.
  17. Michal - Saturday, 12 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @TimR I guess what I'm asking is, if the external thermostat loses connectivity or the esp8266 module fails, will the compressor stay on forever?
  18. TimR - Saturday, 12 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @Michal Yes, I agree about the heating, but I removed both anyway. The fan being on is to get a reading via the thermostat inside of the heat pump itself. If a remote thermostat is used, then the reason for the fan blowing continuously is removed. However, I have no idea if damage can occur. Use at your own risk. It's just a fan setting, but I make no guarantee on it. It's a fix I saw on the Internet. Take it for what it's worth. I can only say I've done the mod on mine and it is working, but only you can decide if you want to do this modification. Every modification carries some risk. Your call. :)
  19. Michal - Friday, 11 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @TimR I don't think it would be worth touching JR01 as when heating is required humidity is not an issue (in my experience). However, what are the consequences of cutting JRRE? My understanding is that the reason the fan turn on is to get a reading of the temperature outside?

    Is it used for anything critical? ie can damage occur in some circumstance if the jumper is removed?
  20. Michal - Thursday, 10 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @TimR Thanks for that! Very useful info.
    Found a nice diagrams starting from page 36 at https://catalogo.lowcostclima.es/download/Manual%20técnico%20aire%20acondicionad...

    I have this AC unit: https://www.dropbox.com/s/tj7zavcm3zcqb49/ac.jpg
  21. TimR - Thursday, 10 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Here's a picture of my control board and the resistor jumper block for reference.

    https://i.postimg.cc/8P8whRQN/controlboard.png
    https://i.postimg.cc/wMDXWr8H/jumpers.png
  22. TimR - Thursday, 10 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @Michal Actually, I found a hardware fix if you prefer to go that way. The option to turn off the fan when the compressor shuts off in cooling mode is controlled by resistor JRRE. For heating, it is resistor JR01. Just remove the resistors and presto, it works. Stupid Mitsubishi decided not to let the customers have an easy way to set this option for ductless units, but I can confirm this work for my MSZ-GL24NA unit. Ymmv, but it may be an solution for your unit if you want to give it a shot. Keep in mind, this should really only be done if the internal thermostat isn't used, since the fan needs to circulate air up into the unit in that case. But if using a remote thermostat, there is no need for the blower to run non-stop.
  23. Michal - Thursday, 10 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @TimR Yes, this is the bane of my existence. I only just found this project (via all that it has spawned) and previous to that I had imagined just turning the unit off once the humidity started rising.

    I believe the problem is related to the AC being too powerful for the area it's cooling. There's an excellent forum discussion about why this happens that I found this years ago when trying to understand WHY the AC would make things better before making them MUCH worse. But as with many other such things I've lost it.

    My medium term goal will be to get this working and then see if I can somehow get it integrated into esphome.
  24. Kitty Fu - Tuesday, 08 October 2019 on product Pololu - TB67S249FTG Stepper Motor Driver Carrier
    Hi Purchasing Department Manager:

    Good day!

    Our company are specialized in making different kinds of connectors,such as orbital junction terminals,screw junction terminals,
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    If your company would like to find a high quality OEM supplier with competitive price,
    please feel free to contact with me.

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    Ms Kitty Fu

    Zhejiang Derks Electrical Co.,ltd.
    Add:North Baixiang Town (Hongfeng),Yueqing city,zhejiang,P.R.China 325603
    Web: www.derks.cn
    Mob: 86 139 6873 0044
    Tel: 86 577 5661 4299
    Email: Kitty.Fu@vip.163.com
  25. Hadley Rich - Tuesday, 01 October 2019 on product PC Engines miniPCI Express Radio
    Thanks Jason, fixed that up.
  26. Jason - Tuesday, 01 October 2019 on product PC Engines miniPCI Express Radio
    Is this product in the right category? This card is currently listed as 'Electronics Gear' but the other PC Engines wireless miniPCI Express card (https://nicegear.nz/product/compex-80211abgn-minipci-express-card) is under 'Wireless Equipment'. Seems like they should both be in the same category?
  27. Hadley Rich - Tuesday, 01 October 2019 on product TP-Link 8 Port Switch - SF1008P
    Thanks Jason! Fixed now, not sure how that happened.
  28. Jason - Tuesday, 01 October 2019 on product TP-Link 8 Port Switch - SF1008P
    I think there is a typo in the description on this production.

    It's listed as
    "TP-Link 8 Port Gigabit Switch - SF1008P 10/100 Switch with 4x PoE, Steel Case"
    which is somewhat contradictory - is it gigabit or a 10/100 switch? The tp-link website would suggest that it's only 10/100 and not gigabit.
  29. TimR - Tuesday, 01 October 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @TvE - You still around? What value did you pull up your CN105 Tx line with? My heatpump is open collector also.
  30. TimR - Wednesday, 25 September 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Thanks for the hacks guys!

    The one issue I have with my Mr. Slim is that the coils get so damp that all the fan does is blow humidity in my room when the compressor isn't running. And the fan seems to run all the time.

    I have a remote thermostat so I don't need the fan blowing to circulate to the internal sensor.

    So how can I have the fan blower turn off when the compressor turns off?
  31. Hadley Rich - Tuesday, 17 September 2019 on product Tilt Hydrometer And Thermometer - Yellow
    Yes they are :)
  32. Peter O'Regan - Tuesday, 17 September 2019 on product Tilt Hydrometer And Thermometer - Yellow
    Hi. Are your Tilts the latest v3 models? Thanks
  33. Peter O'Regan - Tuesday, 17 September 2019 on product Tilt Hydrometer And Thermometer - Yellow
    Hi. Are your Tilts the latest v3 models? Thanks
  34. Hadley Rich - Friday, 06 September 2019 on product Solid State Relay (SSR)
    Hi Jaco,

    Yes this one is AC, the 10A one is DC.

    Cheers
  35. Jaco - Thursday, 05 September 2019 on product Solid State Relay (SSR)
    Is this the 25A version? Just want to make sure as it is listed for cheaper than you 10A version
  36. Allen - Thursday, 15 August 2019 on product 5A 6A Switching Power Supply
    Dear Manager

    How are you? Wish good luck to you and your family, your business.
    You will be glad to know that our price is getting down now.(because of the USD exchange rate and product update)
    For example 12v 5a Wall mount type SAA RCM power adapter new price for 500PCS is 3.99USD/UNIT.

    Free samples could be provided.
    Any further questions,please do not hesitate to inform us.
    Thanks and best regards,
    Best regards.
    Allen
  37. Hadley Rich - Tuesday, 06 August 2019 on product 12V Solenoid Valve - 3/4"
    Hey Ed,

    Unfortunately not, just this one.

    Cheers
  38. Ed - Monday, 05 August 2019 on product 12V Solenoid Valve - 3/4"
    Have you got the normally closed one that is shown in the data sheet?
  39. Ansel - Wednesday, 31 July 2019 on blog post Building 100 Arduino Vacuum Pressure Gauges
    Hi Hadley, i'm very interested with this project. Where i can email you? Thanks
  40. Alan Devine - Tuesday, 30 July 2019 on product Platinum RTD Sensor - PT1000 - 3 Wire, 1 Meter
    Pity this is 4mm diameter, 30mm long. 3D printer standard is 3mm by 20mm.
  41. TvE - Tuesday, 30 July 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    I just spent a bunch of hours trying to talk to my indoor unit (SEZ-KD09) and after banging my head against the wall I finally figured out the serial voltage thing...

    I turns out the TX of the unit is open-collector, which means that without some form of pull-up the esp8266/esp32/serial-dongle cannot receive what the unit is sending. The fact that it's OC is nice because it resolves the "is it 5v or does 3.3v work?" question. On a 3.3v microcontroller simply pull-up to 3.3v and you have a 3.3v level signal. Note that the esp8266/esp32 have an internal pull-up which can be enabled programatically.

    A tell-tale sign of all this is that without anything connected to the CN-105 cable the RX pin of the unit sits at 5V, which is due to its own pull-up, and the TX pin of the unit is at 0V, which is an unlikely state for an idle totem-pole serial output. So the TX of a 3.3V microcontroller can use a simple series shottky diode to protect it from the 5V pull-up (I didn't try to measure the pull-up resistor value).
  42. shweta - Friday, 26 July 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    good knowledge provided about heat pump.......
    very much essential as well as effective.........
    good job.......
    thanks and keep sharing.......
  43. Hadley Rich - Monday, 22 July 2019 on product 2.1mm to 1.7mm DC Jack Adapter
    I'm not sure I understand the question? Does the image help? The male end is the 1.7mm
  44. Michael thomas - Friday, 19 July 2019 on product 2.1mm to 1.7mm DC Jack Adapter
    Hi does this turn a 1.7 mm into a 2.1mm dc point
  45. Jane Atkinson - Wednesday, 17 July 2019 on product PC Engines APU 1D4
    I've been using one of these for nearly three years as a wireless router, running Ubuntu server. It's been super-reliable.
  46. Louis - Wednesday, 10 July 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi E,

    >why not just hack the remote control??

    If you hack/emulate the remote control, you'll be able to start/stop the heatpump, tell it to reach x temp, fan at y speed, etc, that's true. But you cannot know if the message reached it, and you cannot know which temp it senses in the room, and you also cannot know if somebody else changed the settings via the real remote. And finally (and more important for me) you cannot tell it to ignore it's temp sensor and use another data instead, which is really neat if you install a temp sensor in another room for example and you want THAT room to be 22 degrees instead of the air near the unit.

    Hope this makes sense!
  47. Hayden Perham - Monday, 08 July 2019 on product Frequency Generator Kit - FG085
    Hello,

    I require a FG085 or equivalent . Do you have any in stock and if so would i be able to pick this up. I see you are based in Timaru and i require something urgently.

    Thank you
  48. Hadley Rich - Saturday, 06 July 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi E,

    The main reason I started this project instead of using the remote was to get feedback about the current state of the heatpump, closed loop control rather than open.

    Cheers,

    Hadley
  49. E - Saturday, 06 July 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Howdy,

    Awesome info on controlling the mits mini split units via direct connection. Here’s the $1M question I have: why not just hack the remote control?? That was my first thought cuz they’re like $60 and you probably only need one to control many zones...

    Has anyone on this forum looked into that yet.

    Thanks,

    E
  50. E - Saturday, 06 July 2019 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Howdy,

    Awesome info on controlling the mits mini split units via direct connection. Here’s the $1M question I have: why not just hack the remote control?? That was my first thought cuz they’re like $60 and you probably only need one to control many zones...

    Has anyone on this forum looked into that yet.

    Thanks,

    E