not sure but my understanding is that it has to be a divider of the full spped of the clock, 240MHz for ESP32 and a divider of 160MHz for the ESP8266.
Speeds used on ESP8266 is 80Mhz and 160Mhz
Speeds used on ESP32 is 120MHz and 240Mhz
Search found 847 matches
- Mon May 07, 2018 10:52 am
- Forum: ESP32 boards
- Topic: Changing the CPU frequency on ESP32
- Replies: 4
- Views: 10339
- Sun May 06, 2018 9:48 pm
- Forum: General Discussion and Questions
- Topic: return printable chars from byte array
- Replies: 8
- Views: 8624
Re: return printable chars from byte array
@pythoncoder I am wondering about your line of code bytes((x for x in a if x >= 0x20 and x < 127)) I understand what it does and have seen that sort of syntax before but don't understand why it works. I tried a couple of experiments to try to understand it and got some results that I don't understan...
- Fri May 04, 2018 7:42 pm
- Forum: Programs, Libraries and Tools
- Topic: Interfacing Stepper Motor with STM32F407 Disc board
- Replies: 2
- Views: 3183
Re: Interfacing Stepper Motor with STM32F407 Disc board
The pins themselfves won't create enough current to drive thje stepper motor. You will have to have an external power source to all 4 inputs of the motor that is just switched by your pogrom. By far the easiest way to drive a stepper motor with a MCU is with a stepper motor driver. You connect the p...
- Thu May 03, 2018 8:59 pm
- Forum: ESP32 boards
- Topic: Long range WiFi
- Replies: 3
- Views: 3255
Re: Long range WiFi
You might need to check the antenna of the ESP32.
Does it have a PCB antenna?? or does it have the connector for an external antenna??
My ESP32 with PCB antenna works well over much larger distances than you quote and I do believe people are using ESP32 at up to 1km
Does it have a PCB antenna?? or does it have the connector for an external antenna??
My ESP32 with PCB antenna works well over much larger distances than you quote and I do believe people are using ESP32 at up to 1km
- Thu May 03, 2018 8:55 pm
- Forum: ESP32 boards
- Topic: WEMOS LOLIN devices discontinued
- Replies: 4
- Views: 7572
Re: WEMOS LOLIN devices discontinued
Could you recomand a lowcost board with psram ? Recommend that's a hard one. There isn't a lot of boards with the psRAM but slowly more are popping up. They seem to want to charge more for these boards although the difference in price of the modules used to build the boards is nearly then same: Wro...
- Wed May 02, 2018 11:07 am
- Forum: ESP32 boards
- Topic: WEMOS LOLIN devices discontinued
- Replies: 4
- Views: 7572
Re: WEMOS LOLIN devices discontinued
I had a Lolin32 pro but it didn't live very long before it stopped working and others found the same problem. They were only sold for a very short time before being pulled from production.
Choosing a ESP32 dev board with psRAM is an advantage when using MicroPython. The D23 doesn't have the psRAM
Choosing a ESP32 dev board with psRAM is an advantage when using MicroPython. The D23 doesn't have the psRAM
- Sat Apr 28, 2018 7:36 pm
- Forum: ESP8266 boards
- Topic: ~ operator binary complement
- Replies: 18
- Views: 13436
Re: ~ operator binary complement
good day to all, OutoftheBOTS_ with the novelty that does not throw errors but only sends 00000000 zeros to the outport. @cyberlab I make small syntax error in the code and this is why it gets all zeros. I didn't put the [] around the data in the bytearray so it instead made an array the size of th...
- Sat Apr 28, 2018 10:28 am
- Forum: ESP8266 boards
- Topic: ~ operator binary complement
- Replies: 18
- Views: 13436
Re: ~ operator binary complement
@pythoncoder
I hear what your saying but struggling on getting my head around it.
If a python integer is infinite then how is it stored in memory?
Also am I right in assuming that python doesn't have data type like unsigned short or char and stores all of these as an integer??
I hear what your saying but struggling on getting my head around it.
If a python integer is infinite then how is it stored in memory?
Also am I right in assuming that python doesn't have data type like unsigned short or char and stores all of these as an integer??
- Sat Apr 28, 2018 1:49 am
- Forum: ESP8266 boards
- Topic: ~ operator binary complement
- Replies: 18
- Views: 13436
Re: ~ operator binary complement
Yes this might work better with open("Design.DST", "rb") as f: # open design file in binary. f.seek(511) # point to start of design data. lcd.move_to(0,1) lcd.putstr("Sending >") while True: if D_set.value()== False: #Request data from machine. time_out=0 byte = f.read(1)[0] #read the byte to proces...
- Fri Apr 27, 2018 9:47 pm
- Forum: ESP8266 boards
- Topic: ~ operator binary complement
- Replies: 18
- Views: 13436
Re: ~ operator binary complement
maybe try something like this with open("Design.DST", "rb") as f: # open design file in binary. f.seek(511) # point to start of design data. byte = f.read(1) # buffer one byte only. lcd.move_to(0,1) lcd.putstr("Sending >") while byte != b"": # read until end of design file. if D_set.value()== False:...