Most recent activity
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Mon 2019.06.17
Hey @barry_b_benson, since you have quite a few LEDs, have you considered pulsing the on state, with say a thirty percent duty cycle, e.g. ON state == on for ~3ms, off for ~10ms, on for ~3ms, off for ~10ms, on for ~3ms, off for ~10ms, etc over the desired duration or something like that. Eye persistence would/may allow for the indication the LEDs are always on and would only draw 1/3 the power.
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Thanks for that tidbit @Gordon.
While I'll agree the text 'Instance of Serial' is there, one has to 'actually' get there in the first place.
For what it's worth, I was searching down the left side 'Contents' hyperlinks and never saw the link for (only) 'Bluetooth'. Making the connection for 'global Bluetooth' in the search box isn't that intuitive, for me anyway.
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Mon 2019.06.17
'You might find that Bluetooth.write([33,34,35,etc]) is what you want? '
Good afternoon @Gordon,
Where are the Espruino Bluetooth class function definitions or Espruino master class (sub class?) references, so that one may discover the allowable function signatures? Is this documentation in process perhaps?
The only reference I found to
Bluetooth.println()is in -
Sun 2019.06.16
Hello @user97106,
'I send literal 'FF' for 255'
Besides Octal, Hex is the next step up from just sending Binary! Not sure I really understand where the connection is missed? BCD - Binary Coded Decimal?
Javascript is on the send side, whereas Java in on the receive side. So sending hex data as you are, seems the best route for language compatibility. Isn't sending a lightweight payload a goal here?
There are many excellent tutorials within the MDBT42Q web page:http://www.espruino.com/MDBT42Q
http://www.espruino.com/BLE+CommunicationsShort of that I used our old friend Google with the 'site:' keyword qualifier:
Google: how to send an array of data over ble
site:espruino.comand an example that was posted in the forum with corresponding source code:
re: 'without having to decode ASCII characeters (sic) in the iphone app'
Consider sending an encoded Json packet? Base64 encoding?
As a suggestion, post both sides of the communication as it exists now, so that we may better understand where the current thinking is. -
Sun 2019.06.16
re: ' English is not my first language'
Hi @barry_b_benson, you had me fooled, right up to the "Hi
y'all" which gave it away! ;-)
How many LEDs are we talking about and how long are they enabled? Duty cycle?As the entire code block isn't shown, is it possible we are stuck inside a loop perhaps?
(e.g. continuously broadcasting perhaps)Not enough time in sleep mode?
Have you seen these:
In the Tutorial Section: Quick Start Best Practices - increasing battery life
Posting the entire code block would be of immense help here.
Common quote: "The problem is in the code you didn't post."
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Sat 2019.06.15
Untested but, have you looked into one of those rechargeable stakeable lawn lamps? They are about ~2" in diameter. Have no clue at what voltage the solar cell is, but the device only contains a single rechargeable AAA battery. This means maybe two would be needed or a voltage doubler circuit. Would contain all the parts needed for this project, but one would have to dismantle to find out. Sounds like fun!!
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Sat 2019.06.15
The web page content provides sufficient information in order for size comparison.
http://www.espruino.com/MDBT42Q
http://www.espruino.com/PicoThe Pico, sans USB connector tab, has a slightly smaller footprint than the MDBT42Q breakout, although the MDBT42Q is a pin row width, 0.1" wider and two pins longer.
In the Tutorial Section: Quick Start Best Practices - increasing battery life
An existing forum post: Powering with a coin cell
As both possess onboard regulators, what about a drone battery, ~0.75"x~0.5"? Getting around the charge plug and extra wire might be problematic, and the fact a separate rechargeable board or recharger would be needed. -
MaBe
2Google Search0I found these forum references:
http://forum.espruino.com/conversations/285936/#12951616
'There are definitely pins you can't touch because they're used for the flash chip (the 6 pins at bottom of the esp12E modules)'http://forum.espruino.com/conversations/307305/
'These are used by the internal flash chip - you will have issues if you use these pins!'and they both agree with L409-L413 in the jshardware.c assert source note.
So it appears for this particular board, that the prefix 'NodeMCU' must be used for the pin assignments.
More for tomorrow, take a fresh look at all the 'D' references and compare with the pin images.
Mon 2019.06.17
@Unreality this experiment is creating a true
Unreality! ;-)Did you catch the bold text just beneath that code snippet from the link provided?
Forcing the processor to block other requested scheduled tasks is a bad practice, as you have discovered. A forced break/exit is most likely by design as this article points out:
The datasheet for your particular processor may have an explanation also.
The original snippet using
setTimeoutis the recommended way to go.What is the true purpose, an attempt to make Javascript instructions look pretty?