ET-SW01 – A very low consumption mailbox sensor

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Todd Witten
Todd Witten
June 30, 2023 15:00

Can I buy one of these from you?

michel
Admin
Reply to  Todd Witten
July 6, 2023 06:15

We have none available sorry.

Anthony
Anthony
Reply to  michel
October 23, 2023 15:31

You could probably make a few bucks selling them!

michel
Admin
Reply to  Anthony
October 23, 2023 15:35

We will think about it. 🙂

Anders
Anders
December 5, 2023 20:43

Are the component sizes (0603/7343) metric or inches?

michel
Admin
Reply to  Anders
December 5, 2023 21:00
Anders
Anders
Reply to  michel
December 6, 2023 07:57

https://www.topline.tv/sizechart.html

May seem obvious, but in my eyes it’s not that clear 😉

Metric 0603 corresponds to 0201 Imperical, while
Imperical 0603 corresponds to 1608 metric.

For 7343 i can only find reference to metric size, which corresponds to 2917 imperical.

My guess is that the resistors are imperical size 0603 and the capacitor is metric, but I’d very much like it confirmed.

Thank you

michel
Admin
Reply to  Anders
December 6, 2023 08:32

You might want to check the links provided in the BOM. As far as I know those are all standard packages.

0603: The standard dimensions of an 0603 package are: Length: 1.55 ± 0.05 mm. Width: 0.85 ± 0.05 mm. Height: 0.45 ± 0.05 mm.

7343: Surface Mount Tantalum packages are identified by case size i.e.: A, B, C and D. These case sizes stand for metric footprints of length and width. For example: A = 3.2 x 1.6mm; B = 3.5 x 2.8mm; C = 6.0 x 3.2mm; D = 7.3 x 4.3mm.

Anders
Anders
December 12, 2023 19:41

Hi, Is it possible to have the “pick and place”-file published? PCBWay needs it for the assembly process

michel
Admin
Reply to  Anders
December 12, 2023 20:03

No sorry. We are about DIY, not for ordering ready made products.

Tony
Tony
December 13, 2023 04:07

R11 is nowhere to be found on the schematic. Can you please clarify? I only see 9 10k resistors not 10 as the BOM suggests.

Tony
Tony
December 14, 2023 01:12

Also, C6 is 1uf not 0.1uf? Schematic and PCB screen says 1uf but the bom is listed as 0.1uf

Dariusz
Dariusz
January 24, 2024 19:17

I have already damaged 3 esp units, I noticed that there is 5V on the RX/TX outputs of the CH330N system when the module is connected to USB!!!

Tony
Tony
January 28, 2024 19:30

Question: When triggering IN1 or IN2 with ground I cannot get the device to wake up. Am I missing something? Everything seems to work, firmware loaded and events logged in HomeAssistant. If I remove the battery and re-insert the device wakes up but afterwards I cannot trigger the device to power on. I plan on using a reed switch.

Tony
Tony
Reply to  Paul
January 28, 2024 22:07

I can trigger input 2 but not input 1. I tried pulsing IN1 but to no avail. I can power on the device on IN2 if I leave 3v3 on.

Tony
Tony
January 28, 2024 20:48

It seems that I have figured out IN2 but not sure how to trigger IN1. When I apply 3v3 to IN2 I can trigger power on but IN1 I does not seem to be working for me.

Tom Vandepoel
Tom Vandepoel
February 5, 2024 13:32

Hi, I would like to use this board to replace a trigboardv8 that was stolen from my mailbox recently. I have a standard normally-open (NO) reed switch installed in my mailbox which is in closed state when the mailbox is closed (magnet against reed switch).

But reading through above I have the impression that the ET-SW1 is designed to work with a switch that is only closed when the mailbox is opened? Could I make it work with my NO reed switch? Or am I misunderstanding something?

Thanks,

Tom.

Paul
Paul
Reply to  Tom Vandepoel
February 7, 2024 23:33

Hi Tom,

Yes, that is a correct observation. The contact needs to close when mailbox opens. I looked at designing it for the opposite behavior, but that will increase the standby current unfortunately. This design was created to minimize the standby current.

Would it be possible to replace the reed contact for a different model? There are contacts available which have both types of contacts, so you can use the contact configuration required…

Tom Vandepoel
Tom Vandepoel
Reply to  Paul
February 11, 2024 10:36

Thanks Paul, I have already procured a couple of 3-wire reed switches which indeed can do both NO/NC. Should be easy to replace my existing one, no worries! Looking forward to build this project 😉

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