Search found 8 matches

by flashpackets
Fri Nov 29, 2019 9:13 pm
Forum: Hardware
Topic: Is 803.3 Broadband possible?
Replies: 0
Views: 161

Is 803.3 Broadband possible?

I have a simple wired network that would benefit from the simple PSK, NRZ format of 802.3 broadband. Is there sufficient documentation to make this possible? I have a sensor network where the token passing nature of the MAP protocol that was the rage 30 years ago deserves revisiting.
by flashpackets
Fri Jan 25, 2019 1:57 am
Forum: Hardware
Topic: PICO-D4 SMA Antenna Matching
Replies: 7
Views: 1743

Re: PICO-D4 SMA Antenna Matching

Having a pi network in place and finding that a straight short is perfect is better than not having the network, and needing it! If you have the room, put it in. Just because the component positions are available does not mean that they have to be populated. Remember that good ground stitching along...
by flashpackets
Thu Nov 02, 2017 12:07 am
Forum: ESP32 IDF
Topic: undefined reference to `vPortCleanUpTCB'
Replies: 1
Views: 1141

undefined reference to `vPortCleanUpTCB'

I've no idea how this got into the code... Everything was working I promise. esp-idf/components/freertos/./tasks.c:3475: undefined reference to `vPortCleanUpTCB' Although I've been hopping around between releases. I've abandoned esp-idf-v2.1 in favor of v2.0 as that was the last know working version...
by flashpackets
Sat Oct 28, 2017 10:28 pm
Forum: Report Bugs
Topic: Something wonky about GPIO_NUM_17
Replies: 2
Views: 1266

Re: Something wonky about GPIO_NUM_17

This problem has now been confirmed on a second WROOM PCB.
by flashpackets
Sat Oct 28, 2017 10:00 pm
Forum: Report Bugs
Topic: Something wonky about GPIO_NUM_17
Replies: 2
Views: 1266

Something wonky about GPIO_NUM_17

I'm using the WROVER Kit for debug that has a very, very nice JTAG debugger via the Eclipse environment! Kudos! Using the GPIO example code found in esp-idf/peripherals/gpio/ I've found that GPIO_NUM_17 does not work as an input interrupt, works fine on GPIO_NUM_4 ... no idea why. Nothing seems appa...
by flashpackets
Wed Jul 19, 2017 6:16 pm
Forum: General Discussion
Topic: Raw RF interface, possible?
Replies: 8
Views: 4391

Re: Raw RF interface, possible?

I can only second the request for additional physical layer interface info. For instance, I have one application where I need to adjust the output power level down to it's minimum power level. Scanning through the available code base, it wasn't clear where one should go to study up on the magic at t...
by flashpackets
Mon Jul 17, 2017 11:57 pm
Forum: General Discussion
Topic: Strange capture of I2C on logic analyzer
Replies: 8
Views: 3486

Re: Strange capture of I2C on logic analyzer

First, your signal integrity is poor. Your oscillograph shows cross coupling signal lines at the edges. This is a symptomatic of improperly terminated I2C lines. Do both the SCL and SDA lines have pullup resistor? If not try connecting a resistor from each line to +3V3. Normally you can use a resist...
by flashpackets
Tue Jun 27, 2017 10:55 pm
Forum: Showcase
Topic: ESP32 TFT display library
Replies: 66
Views: 69354

Re: ESP32 TFT display library

I'm happy to report that this library works great with absolutely no issues in regard to running with Eclipse. Very nice work!! Once I hooked up the D/C line according to the wiring diagram the display, a 1.44 SPI 128x128 worked great. I can't seem to find the magic switch that inverts the fonts. I ...

Go to advanced search