Search found 15 matches

by colinives
Mon Oct 26, 2020 9:58 am
Forum: General Discussion
Topic: use of SPI pins (GPIO6-GPIO11)
Replies: 1
Views: 83

use of SPI pins (GPIO6-GPIO11)

Hi there,

Looking at the reference information its suggesting that we cannot use GPIO6-11 due to those being used by the internal flash. Are there circumstances where these can be used for other SPI devices if we use a separate CS line when using another SPI device?

Thanks

Colin
by colinives
Wed Oct 21, 2020 10:13 am
Forum: General Discussion
Topic: Use of eMMC and SPI on Wrover
Replies: 0
Views: 86

Use of eMMC and SPI on Wrover

Hi again, I need to connect to an eMMC device (4 data lines) and an SPI peripheral. I'm confused about the the of the SPI pins on the Wrover as these are shared with the internal flash. Can I use another line as the CS (rather than pin 19/SCS/CMD) and share the spirit pins or do I need to assign tot...
by colinives
Wed Oct 21, 2020 6:08 am
Forum: General Discussion
Topic: Esp32 boot up at 1.85V before scaling PMIC
Replies: 0
Views: 88

Esp32 boot up at 1.85V before scaling PMIC

Hi there, I’d live to use a PMIC on a new wearable product. The default boot up voltage is 1.85V thereafter the first code can scale it smoothly to 3.3V before it does anything else. Looking at the data sheets it seems that the esp32 can run off 1.8V -without doing any flash\OTP actions. If the firs...
by colinives
Mon Mar 23, 2020 10:43 am
Forum: ESP IoT Solution
Topic: Using BLE Mesh and A2DP simultaneously
Replies: 0
Views: 3738

Using BLE Mesh and A2DP simultaneously

Is it possible to still use A2DP with ESP mesh running. I have a product under development where one, or more, of the nodes needs to drive sound to selected headphones near it. I have looked and note the wifi/mesh interoperability but not BT Classic/A2DP and mesh. I'm using Wrovers so have the extra...
by colinives
Thu Mar 19, 2020 5:29 pm
Forum: Hardware
Topic: Driven shield for touch sensors
Replies: 1
Views: 1095

Re: Driven shield for touch sensors

By the way - I have previously used touch sensors which used a static DC voltage to read the touch sensor - in this situation I drove a plane behind the sensor using a DAC with the average analog sense voltage on the touch pin - this worked very well. The trouble I have with the ESP32 is that it dri...
by colinives
Thu Mar 19, 2020 4:58 pm
Forum: Hardware
Topic: Driven shield for touch sensors
Replies: 1
Views: 1095

Driven shield for touch sensors

I'm working on a product development using a touch wheel based on the ESP32 touch sensors. The ESP32 is very close behind the touch wheel and the grounded meta cover is messing with the sensitivity. I could design in a driven shield plane between the touch sensors and the ESP32 metal case but don't ...
by colinives
Thu Mar 19, 2020 9:06 am
Forum: ESP-IDF
Topic: Using BLE Mesh and A2DP
Replies: 0
Views: 1208

Using BLE Mesh and A2DP

Is it possible to still use A2DP with ESP mesh running. I have a product under development where one, or more, of the nodes needs to drive sound to selected headphone near it. I have looked and note the wifi/mesh interoperability but not BT Classic/A2DP and mesh. I'm using Wrovers so have the extra ...
by colinives
Wed Mar 18, 2020 1:36 pm
Forum: ESP-ADF
Topic: ADF without codec
Replies: 2
Views: 6231

Re: ADF without codec

Thanks for responding. I guess I'm trying to implement some audio functions with ADF but don't use the line or mic in and am happy with 8-bit internal DAC and A2DP for audio output. I have space issues and want to avoid using a codec chip if I can. I have a LyraT unit I'm which using for development...
by colinives
Sat Mar 14, 2020 12:24 am
Forum: ESP-IDF
Topic: BLE
Replies: 2
Views: 2090

Re: BLE

Thank you for your information.
by colinives
Wed Mar 11, 2020 5:41 pm
Forum: ESP-IDF
Topic: BLE
Replies: 2
Views: 2090

BLE

Hi there. I have a product under development which has a handheld BLE server controlling 3 clients - probably with SPP. The questions I have are: 1). I assume I can connect with more than one BLE device at a time?? Any points on how to do/where to look. 2). If I know the BD name etc of the clients -...

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