<commit_before>---
title: July 2019
order: 45
image: https://cdn.shopify.com/s/files/1/0176/3274/products/Pi-4_ANGLE_TRANS_1024x1024.jpg?v=1561312182
dotpoint1: Raspbian Buster upgrade
dotpoint2: Simultaneous wifi AP mode
dotpoint3: 
---

# Updates to Raspbian Buster firmware for Raspberry Pi 4

<NAME>. suggested that the latest upgrade partially solves some of the heating issues. [This
article](https://www.tomshardware.com/news/raspberry-pi-4-firmware-update-tested,39791.html) confirms the state of play.

# Raspbian AP mode

I have finally nailed down a reliable procedure to setup Raspberry Pi as a wifi hotspot.

[Github page](https://github.com/raspberrypisig/rpi-wifi)


I plan to write a small GUI to make this less painful, and also have a "factory reset" option to cleanly remove AP configuration and sofware.

# Creating and Monitoring PWM signals with Raspberry Pi

With the help of <NAME>. and <NAME>., was able to demonstrate creating a 30khZ 10% duty cycle signal using the pigpio library.
Could generate both hardware and software PWM signal. Also, used a python program to implement a frequency counter on a GPIO pin.

[Details here](https://gist.github.com/raspberrypisig/e7063404468b8db3b7afb875db24f13e)



<commit_msg>Update July-2019.md<commit_after>---
title: July 2019
order: 45
image: https://cdn.shopify.com/s/files/1/0176/3274/products/Pi-4_ANGLE_TRANS_1024x1024.jpg?v=1561312182
dotpoint1: Raspbian Buster upgrade
dotpoint2: Simultaneous wifi AP mode
dotpoint3: Create and monitor PWM signals using pigpio
---

# Updates to Raspbian Buster firmware for Raspberry Pi 4

<NAME>. suggested that the latest upgrade partially solves some of the heating issues. [This
article](https://www.tomshardware.com/news/raspberry-pi-4-firmware-update-tested,39791.html) confirms the state of play.

# Raspbian AP mode

I have finally nailed down a reliable procedure to setup Raspberry Pi as a wifi hotspot.

[Github page](https://github.com/raspberrypisig/rpi-wifi)


I plan to write a small GUI to make this less painful, and also have a "factory reset" option to cleanly remove AP configuration and sofware.

# Creating and Monitoring PWM signals with Raspberry Pi

With the help of <NAME>. and <NAME>., was able to demonstrate creating a 30khZ 10% duty cycle signal using the pigpio library.
Could generate both hardware and software PWM signal. Also, used a python program to implement a frequency counter on a GPIO pin.

[Details here](https://gist.github.com/raspberrypisig/e7063404468b8db3b7afb875db24f13e)




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