Search found 1293 matches

by ESP_Sprite
Fri Jan 05, 2018 10:04 am
Forum: General Discussion
Topic: Esp32 Wifi Long Range Mode
Replies: 3
Views: 170

Re: Esp32 Wifi Long Range Mode

FYI, one of the changes that the LR-mode has is to use a different modulation scheme. I don't exactly know how the RSSI is calculated when LR mode is enabled, but one of the effects could actually be that you can still receive data even at RSSIs where normal WiFi modulation schemes would fail.
by ESP_Sprite
Thu Jan 04, 2018 9:22 am
Forum: ESP32 SDK
Topic: Need advise on SPI CS line control
Replies: 6
Views: 147

Re: Need advise on SPI CS line control

FWIW, on initialization of the SPI bus, you can specify the maximum amount of bytes for DMA transfers in max_transfer_sz in the struct you pass to spi_bus_initialize. This way, you can raise the 4094-byte limit you encountered.
by ESP_Sprite
Tue Jan 02, 2018 9:06 am
Forum: ESP32 SDK
Topic: phy_init: failed to load RF calibration data
Replies: 6
Views: 163

Re: phy_init: failed to load RF calibration data

I am sure it does; those examples do not use WiFi and WiFi is the peripheral that draws the power that makes the ESP32 brown out. Again: check your power supply. If the PCB design has an LDO, see if it can source 500mA or more. If the power comes over the USB lead, remove (non-powered) USB hubs and ...
by ESP_Sprite
Tue Jan 02, 2018 9:01 am
Forum: General Discussion
Topic: Can ESP32 output audio streams?
Replies: 5
Views: 150

Re: Can ESP32 output audio streams?

Technically: yes, the ESP32 has two DACs you can use to directly output an analog signal. You can digitally divide the signal going to this to get some kind of volume control. In practice, these DACs are only eight bit, so audio quality won't be exactly HiFi, so you may want to grab an external code...
by ESP_Sprite
Mon Jan 01, 2018 5:27 pm
Forum: ESP32 Arduino
Topic: ESP32 softap program in Arduino
Replies: 7
Views: 899

Re: ESP32 softap program in Arduino

'The actual problems' are actually pretty simple: the WiFi driver also needs access to the ADC for some specific WiFi-internal measurements. In order to allow both the WiFi-drivers and the user program to access ADC2, we need to have some architecture going: for instance, you wouldn't want to have a...
by ESP_Sprite
Mon Jan 01, 2018 5:16 pm
Forum: General Discussion
Topic: xTaskCreate -> Crash
Replies: 4
Views: 134

Re: xTaskCreate -> Crash

200 bytes of stack is way too little for newlibs printf function. Try giving it some more, 4K or so, and it should work.
by ESP_Sprite
Sat Dec 30, 2017 2:29 pm
Forum: General Discussion
Topic: Happy Holidays! (W/ binary for your ESP32!)
Replies: 7
Views: 1332

Re: Happy Holidays! (W/ binary for your ESP32!)

Huh, I can replicate this... I have one DevkitC with a rev0 ESP32, but also different flash; it also crashes. My rev1 DevkitC with stock flashchip just works. Will see if I can fix this. Edit: Looks like I broke the rev0 compatibility with a last-minute modification... not sure if I'm going to be ab...
by ESP_Sprite
Sat Dec 30, 2017 9:36 am
Forum: General Discussion
Topic: Happy Holidays! (W/ binary for your ESP32!)
Replies: 7
Views: 1332

Re: Happy Holidays! (W/ binary for your ESP32!)

Subtle kick: no one tried this yet?
by ESP_Sprite
Sat Dec 30, 2017 9:33 am
Forum: General Discussion
Topic: "Hot-Reload" options
Replies: 4
Views: 153

Re: "Hot-Reload" options

Actually, I think your colleagues were referring to 'ROM emulators', a device which usually is implemented as a SRAM chip with some logic attached that makes it possible to program it from a computer in-circuit. Back then, these were usually used because flash wasn't available yet, and erasing an EP...
by ESP_Sprite
Thu Dec 28, 2017 6:00 am
Forum: ESP32 Arduino
Topic: ESP32 I2C mapping
Replies: 29
Views: 910

Re: ESP32 I2C mapping

Can I suggest you first read up on I2C to get a grasp on what you're playing with? Not to try to demean you or anything, but I feel that if you're going to use this, reading up on the basics first will answer this question, plus give you the background information to solve a lot of issues you may ru...

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