Oops, I also noticed after posting. I made an edit. Thanks.LoRaTracker wrote: ↑Fri Jan 12, 2018 9:24 pmBut they have less flash and the same RAM as the micro:bit ?
Search found 70 matches
- Fri Jan 12, 2018 10:23 pm
- Forum: ESP32 boards
- Topic: ESP32 and LoRa
- Replies: 70
- Views: 100485
Re: ESP32 and LoRa
- Fri Jan 12, 2018 9:16 pm
- Forum: ESP32 boards
- Topic: ESP32 and LoRa
- Replies: 70
- Views: 100485
Re: ESP32 and LoRa
I have been thinking of doing a similar shield board for ESP32, but I have a few concerns as the amount of EMI these boards put out versus the humble ATmega, the EMI can reduce LoRa sensitivity. That is probably why the LoPy has two separate shields. Perhaps the really cheap RAK811 module would be ...
- Wed Jan 10, 2018 11:17 am
- Forum: ESP32 boards
- Topic: ESP32 and LoRa
- Replies: 70
- Views: 100485
Re: ESP32 and LoRa
Here is a nice project employing the Microchip RN2483 on the Micro:Bit using MicroPython.
- Wed Jan 10, 2018 10:41 am
- Forum: ESP32 boards
- Topic: ESP32 and LoRa
- Replies: 70
- Views: 100485
Re: ESP32 and LoRa
@loboris I have seen those. However, from what I can read, these serial modules only implement point-to-point LoRa; not the full LoRaWAN protocol to connect to for example TheThingsNetwork. This makes a huge difference. Personally, I am looking for LoRaWAN solutions that would easily work with stand...
- Wed Jan 10, 2018 2:30 am
- Forum: ESP32 boards
- Topic: ESP32 and LoRa
- Replies: 70
- Views: 100485
Re: ESP32 and LoRa
@LoRaTracker You made my day by pointing out the Microchip RN2483 with serial interface and firmware-based LoRaWAN protocol. Taking that route saves valuable RAM heap stack. Eventually, I was lead to the very similar RAK811 module which is sold on Aliexpress with its populated breakout board for a v...
- Sat Jan 06, 2018 7:18 am
- Forum: Drivers for External Components
- Topic: RFM95W lorawan stack ?
- Replies: 8
- Views: 8958
Re: RFM95W lorawan stack ?
Here might be what we have been looking for.
Someone made a modified version of Pycom's MicroPython (originally written for the LoPy) adapted for any ESP32 with an SX1272 LoRa module. LoRaWAN reportedly is supported.
Someone made a modified version of Pycom's MicroPython (originally written for the LoPy) adapted for any ESP32 with an SX1272 LoRa module. LoRaWAN reportedly is supported.
- Fri Dec 29, 2017 6:47 pm
- Forum: General Discussion and Questions
- Topic: MicroPython round() Function
- Replies: 20
- Views: 26289
Re: MicroPython round() Function
@Dave You are right about the noise. That is the IEEE 754 graph above. Anyhow, for me the lesson learned is that round() is not sufficient for string formatting; repr(round()) is required. >>> f = 1011.639952 >>> print('%f' % (round(f,1))) 1011.599898 >>> print('%s' % (repr(round(f,1)))) 1011.6 I wi...
- Fri Dec 29, 2017 8:33 am
- Forum: Programs, Libraries and Tools
- Topic: uasyncio - asyncio-like cooperative multitasking framework for uPy
- Replies: 114
- Views: 136031
Re: uasyncio - asyncio-like cooperative multitasking framework for uPy
@Roberthh Wow, that is truly impressive!
I only hope Pycom understands and appreciates what you have achieved.
I only hope Pycom understands and appreciates what you have achieved.
- Fri Dec 29, 2017 1:51 am
- Forum: General Discussion and Questions
- Topic: MicroPython round() Function
- Replies: 20
- Views: 26289
Re: MicroPython round() Function
Still, there seems to be something wrong…
OK, but this should have the same internal representation:
However, it has an internal representation that is further off.
Code: Select all
>>> f = 1011.60004
>>> print('%f' % f)
1011.600017
Code: Select all
>>> f = 1011.60003
>>> print('%f' % f)
1011.599898
- Fri Dec 29, 2017 1:06 am
- Forum: General Discussion and Questions
- Topic: MicroPython round() Function
- Replies: 20
- Views: 26289
Re: MicroPython round() Function
Yep, you are right, Dave. The same effect can be reproduced with much larger numbers on CPython. I have also been reading about the IEEE 754 standard. A summary of my findings can be found in the now somewhat redundant bug report . Below graph explains very well the difference in floating point arit...