💬 Sensebender Gateway
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@tbowmo @hek Would you guys maybe willing to try any other company? There are multiple PCB manufacturers in Hong Kong. My personal experience with Itead is mixed. Their support is extremely poor - It looks like one person responsible for supporting multiple products. They are cheap, but struggling with fast expansion launching their own IOT products (Sonoff).
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we have looked at a couple of other manufacturers in China / Hong Kong area.. But found (back then) that Itead was the best solution, as they would handle manufacturing, stock, and shipment for us, and pay us a commission of the sale which makes it extremely easy for us to handle product launches
With the other manufacturers we had to buy 100/200 units, and handle stock / shipment ourselves, and with the limited time for the project (as most of us have families and daytime jobs to take care of, besides of bringing new products into the world), this is not a feasible solution..
My contact person at Itead, promised that she would get the quotation guy to answer me today. So let's see what happens
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I'm not sure. But I think I read somewhere that the manufacturers in china are closed due to holiday.... At least I think I read that on aliexpress.
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Almost ready for a last roll of prototype.. I've updated github with latest changes, if anyone cares to have a look at it, and give me some feedback on it, then it is now! during Easter, I will (hopefully) do the last prototype spin!
@tbowmo Hi! Very cool design, I especially like using of ARM microcontrollers. I have a lot of projects with SAMD20, and I want to give you a little advice for your future revision of your "Mysensors Gatevay". When I had problems with my devices work (there were crashes and hangs) I found the circuit of evaluation board called "SAM D20 Xplained Pro". After examining this circuit I saw that they apply more capacitors in the power supply than I. And I thought that use just one capacitor 100 nF not enough. So, I corrected the filtering circuit in my devices and everything worked perfectly. Below I'm showing the filtering scheme:
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Thanks for the tip.. I took heavy inspiration from the arduino zero, which only has 100nF capacitors for decoupling.
I haven't seen any problems with stability on the prototype GW's that I have build, we also have 5 production sample GW's out in the wild, at a couple of the core group members, and I have not heard any problems from them either.
Anyways, I have noted it, and will take it into consideration if I/we decide to do a new revision of the schematic / layout.
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Thanks for the tip.. I took heavy inspiration from the arduino zero, which only has 100nF capacitors for decoupling.
I haven't seen any problems with stability on the prototype GW's that I have build, we also have 5 production sample GW's out in the wild, at a couple of the core group members, and I have not heard any problems from them either.
Anyways, I have noted it, and will take it into consideration if I/we decide to do a new revision of the schematic / layout.
@tbowmo said:
@kalina
I haven't seen any problems with stability on the prototype GW's that I have build...Of course, your device may work perfectly without additional capacitors. This is just my experience.
In my devices there are large number of impulse noises, because they contain FPGA... and one more interesting thing, I have compared two datasheets on SAMD20 and noticed that in new revision they have increased the VDDCORE capacitor from 100 nF to 1 uF :smiley:
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Is there any news about selling this PCB ?
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I find it on Itead but no announcement on mysensors.org.
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Which exact RFM69 is the footprint for? Cause it says "RFM69HCW" in some places, and "RFM69HW" in others. The footprint looks a lot like HW (https://c1.staticflickr.com/1/563/20328459340_62fa380554_b.jpg).
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Oh and another question, since I've never ordered anything from ITEAD before, how do they declare the customs value? Is it safe to order more than one gateway or should I order them one by one to be on the safe side? I'm talking about "SF E-Parcel" or "Registered Air Mail" of course, not TNT or DHL.
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@bjornhallberg, I don't remember what the value was set to on the latest package from them.
Suggest you contact them here:
https://www.itead.cc/contact-us -
@bjornhallberg they declare a very low customs value (for my last order only 12x0.89€ ...)
I juste order the gateway today.
