From c40aa38862d3805aff6a84692dbbd9919bcedd62 Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Sun, 11 Dec 2022 10:42:35 +0000
Subject: [PATCH] improve instructions

---
 README.md | 17 +++++++++++++++++
 csc.py    |  4 +---
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 064612b..8a5b479 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,20 @@ Perhaps useful if you have a stationary bike of some kind and want to
 put the vital statistics on a big screen instead of on your handlebar.
 
 ![screenshot](20221209_22h46m07s_grim.png)
+
+## How to use
+
+First you need to identify bluetooth address of your bike sensor(s).
+Spin the wheel to wake it up, then run
+
+```sh
+$ bluetoothctl scan on
+Discovery started
+[CHG] Controller 24:FD:52:00:ED:F1 Discovering: yes
+[NEW] Device C2:35:5D:F2:F4:0F  Giant Combo
+[CHG] Device 98:06:3A:15:B7:BA RSSI: -82
+^C
+$ bluetoothctl connect  C2:35:5D:F2:F4:0F
+```
+
+Now 
\ No newline at end of file
diff --git a/csc.py b/csc.py
index d9b7e7b..50eb082 100644
--- a/csc.py
+++ b/csc.py
@@ -111,9 +111,7 @@ class Biscuit:
         pygame.display.flip()
 
 
-
-bike_address = 'C2:35:5D:F2:F4:0F'
-bike = BLE_GATT.Central(bike_address)
+bike = BLE_GATT.Central(sys.argv[1])
 bike.connect()
 app = Biscuit()