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Admin



Joined: 30/05/2014 21:46:20
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Forum for Support of the MiniWireless Product Family

This message was edited 2 times. Last update was at 30/05/2014 22:06:47

JohnO



Joined: 12/06/2014 09:33:07
Messages: 2
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What does anyone think the demand for a version equipped with the ATMega1284(p) & RFM69HW with the more unusual radio PCB pads wired to 1284 pins.
Maybe at 20Mhz while we are at it.

I find myself wanting more RAM.

This message was edited 3 times. Last update was at 12/06/2014 12:16:07

Rick



Joined: 30/05/2014 22:08:56
Messages: 93
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Hi John,

Thanks for your suggestion, and I definitely concur on the ram...also on flash program memory.

I would like to introduce such a product line as well, but realistically, it might be several weeks before I can allocate the time to launch it.
Others have made similar suggestions, and I hope to be able to move it up sooner.

Cheers,
-Rick
SadE



Joined: 18/07/2014 06:51:14
Messages: 15
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Hi,

Does the Minireless is loaded with a specific bootloader ?
I cannot upload any sketch to it (all the 3 boards I have) .
At startup, the led is blinking about ten times, then blinking every 2 seconds forever.
I'm using the FTDI basic (3.3V) from Sparkfun, and the DTR line seems to be driven correctly (the unit is rebooted during the upload try).
The IDE is returning :
avrdude: stk500_getsync(): not in sync: resp=0x00

Regards.




SadE



Joined: 18/07/2014 06:51:14
Messages: 15
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Or maybe I need to add some entries in the boards.txt file ?
dirkc



Joined: 18/07/2014 21:09:17
Messages: 2
Location: Germany
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I am also not quite sure if a bootloader is installed by default. And if so, what bootloader is it exactly?

In terms of programming there might be some hints at
https://learn.adafruit.com/ftdi-friend/programming-the-arduino-bootloader

If this is helpful to you, please reply to this post as I am also at the same stage.

Dirk
SadE



Joined: 18/07/2014 06:51:14
Messages: 15
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Moreover I saw the 328P is not stated to work with 3.3V at 16Mhz.
It could work , maybe in 90% of cases, or could work at 25°C and not a 0° ...
An answer from the designer is widely expected !
Rick



Joined: 30/05/2014 22:08:56
Messages: 93
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Greetings,

Thank you for your comments and concerns...

BootLoader / Programming:
All miniWireless and Mini boards are preloaded with the Duemilanove bootloader AND all are 100% tested prior to shipping.
If you are using the Arduino IDE, you would choose Duemilanove with ATmega328P 16Mhz. Just hook it up to a standard FTDI<>USB interface, and it should be fine.
If you're running an older RFM12B or RFM69CW type MW, they use a 3.3V FTDI. Otherwise, you can use 5V FTDI. More details are on the miniwireless webpage.
If you have issues with our devices, then please contact us, and are happy to help and honored to be of service.

Over-Clocking:
Yes it is true that the device is overclocked at 16Mhz, according to the Atmel spec. ...as are many other low cost units out there on the net, like jeenodes, lowpowerlab and tons of others.
Not sure where you saw 90%, but that is not my experience with these. Even when I was at an Atmel low power seminar in Boston, their own application engineer told me the spec was "overly conservative".
My own experience with these are as follows... I've run over 500 units of HVAC wireless controllers, which are overclocked and have been running for over three years(wide temperature swings between winter and summer) with ONE failure due to a lightening strike. I've also run hundreds of other wireless nodes out there which have sensed, monitored and worked 24x7x365 with no detected issues. I have to admit, it does disturb me to overclock these things; however, if the modules are being used for testing and evaluation purposes, then for all practical purposes it's a non-issue--especially considering the price-point. On the other hand, if it is a production mission critical project, then either lower the clock to 8Mhz, look ~ pg. 34 in the datasheet about register settings on slowing down the MCU, or simply do a design with level shifting. We are also happy to provide these at 8Mhz, as we have done so per request on several occasions.

I would like to pose a question.... Would any of you like for us to do a miniWireless that runs 5V internally with level shifting? I've actually been considering this for some time, but I'd like to hear back from you...

Thank you everyone for participating in the Forum. This is just the beginning stages, but I hope this can be a useful and thoughtful place for collaboration and value add.

Have a great day, a kind regards,
Rick

This message was edited 1 time. Last update was at 19/07/2014 02:41:46

SadE



Joined: 18/07/2014 06:51:14
Messages: 15
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First , thanks for you detailed answer.

So I guess my FTDI basic 3.3V is dead , I'll waiting for a new one in the next days :-/
You told 5V can be use for programming . But on the 69HW datasheet , the max operating voltage for the RF module is 3.6V and the absolute power voltage is 3.9V.
Could 5V really used without destroy the RFM69 ?

Concerning the overclocking , nice to get data that confirms it can be done without trouble !

And for the internally 5V , I say : stay with 3.3V ! Wireless module (at least for me) are mostly battery power. First, low voltages is more efficient , and LiPO/Li Ion
battery can be used directly .

Could you say more about the next generation of miniwireless, the hardware structure (with 50nA of hibernation current Oo) . Please tease us !

Regards.


Rick



Joined: 30/05/2014 22:08:56
Messages: 93
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Hi SadE,

It seems I must not have been clear, but when I mentioned programming with a 5V FTDI, the Miniwireless has a built-in LDO regulation which lowers this to 3.3V. Only 3.3V is applied to the radio, MCU, Memory, RTC. This is because all the newer miniWireless boards all have the FTDI connector power pin as VIN (not VCC)--Therefore, all the newer miniWireless can be used by either the 5V or 3.3V FTDI. Only the older MiniWireless B/CW (which is the one for RFM12B / RFM69CW) has the FTDI coming in as VCC, so ONLY that first version of the miniWireless has this FTDI 3.3V requirement. Hope this helps clarify a bit. Please let me know if you have further questions.

I'll follow-up with another post introducing the new miniWireless series. I've just completed testing on the first two types, which are for the RFM69HW/W and RFM23BP radios.

All the best...
-Rick
SadE



Joined: 18/07/2014 06:51:14
Messages: 15
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Ok ! I didn't understand because I looked at the schematic on miniwireless page
Rick



Joined: 30/05/2014 22:08:56
Messages: 93
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Thanks, I'm glad you mentioned that.
I need to update that page, because it only shows schematic and module pinout of the earlier B/CW version.
grantsmith



Joined: 06/07/2014 16:15:35
Messages: 4
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Rick,

If I wanted to power one of the new LoRa Miniwireless modules WITHOUT using FTDI, what would the best option be ? Could I just apply 3.3v to VCC, from a 3.3V wall charger ?

Also, would 500mA suffice ?
Rick



Joined: 30/05/2014 22:08:56
Messages: 93
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Hi Grant,
Yes, you can apply 3.3V to VCC, and 500mA sufficiently covers component requirements. With the STRONG assumption however, that there is good quality and voltage stability from your wall charger.
A better choice might be 5V on the VIN input pin.

Cheers. -rick
JohnO



Joined: 12/06/2014 09:33:07
Messages: 2
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Rick wrote:Hi John,

Thanks for your suggestion, and I definitely concur on the ram...also on flash program memory.

I would like to introduce such a product line as well, but realistically, it might be several weeks before I can allocate the time to launch it.
Others have made similar suggestions, and I hope to be able to move it up sooner.

Cheers,
-Rick


Hi Rick, is the 1284P MiniWireless still on your radar?
w1ll14m



Joined: 03/10/2014 07:24:02
Messages: 21
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Rick wrote:Hi John,

Thanks for your suggestion, and I definitely concur on the ram...also on flash program memory.

I would like to introduce such a product line as well, but realistically, it might be several weeks before I can allocate the time to launch it.
Others have made similar suggestions, and I hope to be able to move it up sooner.

Cheers,
-Rick


Hi Rick,

I would definitely love a ATMega1284, maybe a MegaWireless with all the fancy stuff the MiniWireless has?

Regards,
William
Rick



Joined: 30/05/2014 22:08:56
Messages: 93
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RE: Concerning the MiniWirelessMega ---

Here's the update for the 1284 miniWireless Mega series...
We now have a mega board, that we have been evaluating and testing, and things are looking very good to go forward with production.

Features:
- RTC with support 2-types of SuperCap
- Memory 128Mb standard (up to 256Mb)
- Mosfet Power Control
- ATmega1284p, 16Mhz
- LDO Power regulation
- SMA Connector
- Support for RFM69HW, W on bottomside (more to come)
- Pinout compatible with miniWireless - for sharing of shields
- modern bootloader, but may update with another on release (for full support for wireless programming)

Price TBD (perhaps about $3 more than current miniwireless)

Here's an image of one of our first prototypes:


w1ll14m



Joined: 03/10/2014 07:24:02
Messages: 21
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Rick wrote:RE: Concerning the MiniWirelessMega ---

Here's the update for the 1284 miniWireless Mega series...
We now have a mega board, that we have been evaluating and testing, and things are looking very good to go forward with production.

Features:
- RTC with support 2-types of SuperCap
- Memory 128Mb standard (up to 256Mb)
- Mosfet Power Control
- ATmega1284p, 16Mhz
- LDO Power regulation
- SMA Connector
- Support for RFM69HW, W on bottomside (more to come)
- Pinout compatible with miniWireless - for sharing of shields
- modern bootloader, but may update with another on release (for full support for wireless programming)

Price TBD (perhaps about $3 more than current miniwireless)

Here's an image of one of our first prototypes:





Nice! I can use that SRAM!

This message was edited 1 time. Last update was at 07/11/2014 08:50:48

stevech



Joined: 07/07/2014 18:07:27
Messages: 91
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SadE wrote:Moreover I saw the 328P is not stated to work with 3.3V at 16Mhz.
It could work , maybe in 90% of cases, or could work at 25°C and not a 0° ...
An answer from the designer is widely expected !

328P does work for 16MHz at 3.3v but I've never tried it at the extremes of temperature specs. It may not work at 20MHz at 3.3 rather than 5V.

This message was edited 2 times. Last update was at 07/11/2014 22:00:58

koceng



Joined: 04/09/2017 03:51:35
Messages: 1
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