bug fix

01 Getting Started.md

@@ -38,6 +38,7 @@ network={
     psk="YOUR_WIFI_PASSWORD"
     key_mgmt=WPA-PSK
 }
+
 ```
 
 ## 3 First Boot
@@ -53,6 +54,7 @@ The first task we should do is to update the software installed on the Raspberry
 ```shell
 sudo apt update
 sudo apt upgrade -y
+sudo apt install -y python python-pip
 sudo apt install -y apt-transport-https rsync sudo nano git tree curl software-properties-common mc build-essential libssl-dev libffi-dev i2c-tools
 ```
 

03 Using the SPI Protocol.md

@@ -1,12 +1,18 @@
 
 # Using the SPI Protocol
 
+
+
 - Display using the e-ink screen?
 - Writing to an SD card?
 
 Sensors
 
 - RFID
-- ADXL345 3-axis accelerometer tilt sensor (also I2C)
+- **ADXL345 3-axis accelerometer tilt sensor (also I2C)** (~£5)
 - BMP280 temperature/humidity (also I2C)
 - CD74HC4067 CMOS 16 Channel Digital Analog Multiplexer
+
+## References
+
+- [IAdding a secondary sd card on Raspberry PI](https://ralimtek.com/raspberry%20pi/electronics/software/raspberry_pi_secondary_sd_card/)

06 Using Docker.md

@@ -0,0 +1,55 @@
+
+# Using Docker
+
+## 1 Installing Docker
+
+The first step is to install docker on the Raspberry Pi. It is assumed you have already set up your Raspberry Pi using the instructions in the **Getting Started** worksheet.
+
+The simplest way to install Docker is to use the apt package manager. We search for the software we want, check the details and then install:
+
+```shell
+$ sudo apt update
+  Fetched 13.0 MB in 1min 8s (191 kB/s)                                                                                        
+  Reading package lists... Done
+  Building dependency tree       
+  Reading state information... Done
+$ apt cache search docker
+  docker - transitional package
+  docker-compose - Punctual, lightweight development environments using Docker
+  docker-swarm - Docker\'s native clustering system
+  docker.io - Linux container runtime
+$ apt-cache policy docker.io
+  docker.io:
+    Version table:
+    *** 18.09.1+dfsg1-7.1+rpi1 500
+        500 http://raspbian.raspberrypi.org/raspbian buster/main armhf Packages
+        100 /var/lib/dpkg/status
+$ sudo apt install docker.io
+$ docker --version
+```
+Once the software is installed, lwe should test the setup with the Docker equivalent of "hello world"
+
+```shell
+$ docker run hello-world
+  Unable to find image 'hello-world:latest' locally
+  latest: Pulling from library/hello-world
+  c1eda109e4da: Pull complete 
+  Digest: sha256:6540fc08ee6e6b7b63468dc3317e3303aae178cb8a45ed3123180328bcc1d20f
+  Status: Downloaded newer image for hello-world:latest
+
+  Hello from Docker!
+```
+
+### 1.1 Test Your Understanding
+
+You will also need to install:
+
+1. Docker Compose
+2. Docker Swarm
+
+Use the commands from the installation of the Docker container runtime to find the names of the packages in the repository, check their versions and install.
+
+## 2 Deploying Containers
+
+- using existing image as a base
+- deploy to the Rpi