Search found 73 matches
- Wed Jun 30, 2021 3:57 am
- Forum: General Discussion
- Topic: BLE HID keyboard security question
- Replies: 1
- Views: 2092
BLE HID keyboard security question
I'm implementing a BLE HID keyboard using the ESP32-BLE-Keyboard library. I have a question about security. Suppose I pair and bond with the desired remote host (phone or PC) using a PIN. Now if the remote host has Bluetooth turned off and I switch on the BLE keyboard, is it possible for a third par...
- Sat Feb 06, 2021 2:47 pm
- Forum: ESP32 Arduino
- Topic: Can I use ESPAsyncWebServer over Ethernet ? (Arduino-ESP32 v1.04)
- Replies: 0
- Views: 2430
Can I use ESPAsyncWebServer over Ethernet ? (Arduino-ESP32 v1.04)
I have a basic EthernetWebServer library example working using SPI interface to ENC28J60. No problem running a simple 'hello world' web server. I then tried running a simple AsyncWebServer example over Ethernet. I have the Ethernet interface up and an IP address allocated via DHCP. But the AsyncWebS...
- Sat Jun 06, 2020 11:13 am
- Forum: General Discussion
- Topic: What would you like to see in The Next Chip?
- Replies: 426
- Views: 785085
Re: What would you like to see in The Next Chip?
Big thumbs up for : 1. RISC V cores - simply because you will have more software engineers willing to invest the effort if the knowledge is transferable, and so, a bigger pool of software engineers who can contribute to developing drivers, toolchain improvements, applications. 2. DMA to/from PSRAM t...
- Sat Dec 28, 2019 3:47 am
- Forum: General Discussion
- Topic: What would you like to see in The Next Chip?
- Replies: 426
- Views: 785085
Re: What would you like to see in The Next Chip?
I think also more details into the functioning of the peripherals would be a good investment as it should carry forward to new processor designs, e.g. an ADC that delivers accurate results. Absolutely ! Unfortunately not paying enough attention to the peripherals and peripheral control, i.e. gettin...
- Fri Nov 15, 2019 7:25 am
- Forum: ESP-IDF
- Topic: I2S microphone (RX)
- Replies: 60
- Views: 134429
Re: I2S microphone (RX)
Hi, Just in case you guys didn't see this already https://hackaday.io/project/162059-street-sense/log/160705-new-i2s-microphone It seems the SPH0645 timing is incompatible with the ESP32 i2s peripheral. The data transitions on the rising edge of BCK, just when the ESP32 is sampling the data. They en...
- Mon Sep 16, 2019 3:05 pm
- Forum: Hardware
- Topic: Recommend some H Bridge chip with low voltage drop please
- Replies: 3
- Views: 5662
Re: Recommend some H Bridge chip with low voltage drop please
If bjt voltage drop is the problem, why not use a mosfet h bridge (with p and n low threshold mosfets , e.g. BSS84 and BSS138 ) ? See https://circuitdigest.com/electronic-ci ... ing-mosfet for the schematic.
- Wed Aug 28, 2019 6:04 am
- Forum: General Discussion
- Topic: What would you like to see in The Next Chip?
- Replies: 426
- Views: 785085
Re: What would you like to see in The Next Chip?
I hope you're giving some attention to the micro-controller and hard real-time aspect as well. For me a really drool-worthy module would have the architecture features of the Teensy 4 along with communications hardware. Scalable instruction clock with fine resolution, independent of peripheral clock...
- Fri Jul 19, 2019 3:17 am
- Forum: Hardware
- Topic: Brownout prevention circuit
- Replies: 13
- Views: 23898
Re: Brownout prevention circuit
I had restart problems when using a large capacitor e.g. 330uF on the 3V3 line. Power supply was 4.2V lipoly battery + 3V3 LDO regulator - would not reboot if I switched off and switched on again within a few seconds. Suspected the large capacitor was discharging slowly and maintaining enough residu...
- Tue Jul 16, 2019 3:54 am
- Forum: Hardware
- Topic: Power consumption - especially if not everything is working smooth
- Replies: 7
- Views: 10521
Re: Power consumption - especially if not everything is working smooth
I've used a TPS3839 voltage supervisor on a WROVER breakout board. My main concern is when I have a large capacitor on the 3.3V supply line. Switching off the power supply to the voltage regulator results in a flaky restart when the regulator output capacitors do not discharge fully on shutdown - no...
- Sun Jul 07, 2019 10:33 am
- Forum: Report Bugs
- Topic: spi peripheral doesn't work if MISO pin set to -1
- Replies: 2
- Views: 5799
spi peripheral doesn't work if MISO pin set to -1
Hi, I'm using the hspi peripheral to write to an LCD - so I only need the SCK and MOSI pins on the spi peripheral (am using software SS). I'm using the esp32-hal api : when I set the MISO pin set to -1, there is no compilation error, and no run-time error, but the spi transfers do not work. If I set...