Search found 964 matches

by Roberthh
Sun Aug 05, 2018 12:18 pm
Forum: ESP8266 boards
Topic: Uploading MicroPython to Wemos D1 leads to garbage
Replies: 12
Views: 724

Re: Uploading MicroPython to Wemos D1 leads to garbage

If you can set the baud rate to 76800 at screen, then you can read the "Garbage", which may tell you more about what's going on.
by Roberthh
Sat Aug 04, 2018 6:40 am
Forum: ESP32 boards
Topic: New Lolin D32 Pro with 4MB PSRAM
Replies: 27
Views: 1757

Re: New Lolin D32 Pro with 4MB PSRAM

I agree to the assumption that GPIO0 of the ESP32 is floating during reset. The oscilloscope picture also show some ripple during that phase. About your intial problem: For me it is more likely that it is a timing issue: the switch from reset low to GPIO0 low does not happen fast enough. And that in...
by Roberthh
Fri Aug 03, 2018 3:20 pm
Forum: ESP8266 boards
Topic: Static IP
Replies: 4
Views: 133

Re: Static IP

In the python script is a mix of tab and space. That gives the error and causes the script to stop. Better replace all tabs by space. I did that and also reordered a few lines. import gc import machine import webrepl import network import time webrepl.start() gc.collect() def connect(): # Create Sta...
by Roberthh
Fri Aug 03, 2018 5:44 am
Forum: ESP8266 boards
Topic: Static IP
Replies: 4
Views: 133

Re: Static IP

in station mode you can call ifconfig() to assign a static IP address. You can do that before calling connect(). So a suitable sequence of commands could be: wlan = network.WLAN(network.STA_IF) # create station interface wlan.active(True) # activate the interface wlan.ifconfig(("my_ip_address", "255...
by Roberthh
Thu Aug 02, 2018 3:39 pm
Forum: ESP32 boards
Topic: ESP32 and LoRa
Replies: 58
Views: 6630

Re: ESP32 and LoRa

The files which I recently placed in the repository are meant for Pycom devices. The change is adding region IN865.
I would not publish code for other device with sx127x chips w/o testing that before. But I do not have such devices available, and I am not going to purchase one of these.
by Roberthh
Thu Aug 02, 2018 1:09 pm
Forum: ESP32 boards
Topic: Installing libraries on ESP32
Replies: 14
Views: 374

Re: Installing libraries on ESP32

@pythoncoder:
Or use an ESP32 with SPIRAM and the Loboris port.
The micropython.org port also supports SPIRAM. https://github.com/micropython/micropyt ... 092ee354b0
by Roberthh
Thu Aug 02, 2018 1:00 pm
Forum: Development of MicroPython
Topic: submodule status is strange.
Replies: 2
Views: 84

Re: submodule status is strange.

If it works (=compiles and builds), don't touch it.
by Roberthh
Thu Aug 02, 2018 12:56 pm
Forum: ESP8266 boards
Topic: webrepl autostart
Replies: 2
Views: 93

Re: webrepl autostart

As you assume, you have to put these two statements into boot.py. Actual it is already in boot.py, but commented out. Webrepl also supports copying in and out files. So once you have webrepl running, you can use that to get boot.py, modify it and put it back onto your device. An yes, you can also us...
by Roberthh
Wed Aug 01, 2018 8:35 pm
Forum: ESP32 boards
Topic: New Lolin D32 Pro with 4MB PSRAM
Replies: 27
Views: 1757

Re: New Lolin D32 Pro with 4MB PSRAM

What is still confusing, compared with the esp8266, that IO0 is low while Reset is pulled low. The external circuitry cannot do this, at least not if is the one of the schematics. But looking on an older WEMOS LOLIN32 Pro, I see the same behavior, but w/o the IO0 going up for a moment after reset. T...
by Roberthh
Wed Aug 01, 2018 5:20 am
Forum: ESP32 boards
Topic: New Lolin D32 Pro with 4MB PSRAM
Replies: 27
Views: 1757

Re: New Lolin D32 Pro with 4MB PSRAM

Unless they changed the logic on the board, it looks like a fault in the circuit. The usual 2 transistor reset/IO0 logic cannot pull both inputs low at the same time. See schematics: https://wiki.wemos.cc/_media/products:d32:sch_d32_pro_v2.0.0.pdf You could try to add an external pull-up resistor to...