From ba4a397e5cd38dd65d0aef9ed864b55fe2eb401d Mon Sep 17 00:00:00 2001
From: Peter Hart <cinphart@gmail.com>
Date: Fri, 28 Aug 2020 23:37:54 -0400
Subject: [PATCH] wlan, ntp, time/ip display

---
 boot.py   | 43 +++++++++++++++++++++++++++++++++++++
 main.py   | 22 ++++++++++++++++---
 notes.org | 64 ++++++++++++++++++++++++++++++++++++++++++++++---------
 3 files changed, 116 insertions(+), 13 deletions(-)
 create mode 100644 boot.py

diff --git a/boot.py b/boot.py
new file mode 100644
index 0000000..ea1e65c
--- /dev/null
+++ b/boot.py
@@ -0,0 +1,43 @@
+# This file is executed on every boot (including wake-boot from deepsleep)
+#import esp
+#esp.osdebug(None)
+#import webrepl
+#webrepl.start()
+
+import network
+import machine
+wlan = network.WLAN(network.STA_IF)
+wlan.active(True)
+binary_id = machine.unique_id()
+hostname = 'timeular-{:02x}{:02x}{:02x}{:02x}'.format(binary_id[0],binary_id[1], binary_id[2], binary_id[3])
+wlan.config(dhcp_hostname=hostname)
+
+iphone = b'Hart\xe2\x80\x99s iPhone'
+home = b"Hart's"
+
+ff=wlan.scan()
+connecting=true
+for i in ff:
+    print(i)
+
+def matches(nws, sid):
+    for i in nws:
+        if i[0] == sid:
+            return True
+    return False
+    
+if matches(ff,iphone):
+    print('connecting to iphone')
+    wlan.connect(iphone,'rg3t3jpht2aah')
+elif matches(ff,home):
+    print('connecting to home')
+    wlan.connect(home,'D187wn644GeH')
+else:
+    print('not connecting')
+    connecting = false
+while connecting and not wlan.isconnected():
+    machine.idle()
+print('WLAN connection succeeded')
+
+import ntptime
+ntptime.settime()
diff --git a/main.py b/main.py
index 9ca3aa0..506b667 100644
--- a/main.py
+++ b/main.py
@@ -1,6 +1,8 @@
-from machine import I2C, Pin
+from machine import I2C, Pin, Timer, RTC
+from network import STA_IF, WLAN
 import ssd1306
 import time
+import utime
 from mpu6050 import accel
 
 screen = {}
@@ -21,13 +23,27 @@ mpu['sda'] = Pin(23, Pin.OUT, Pin.PULL_UP)
 mpu['i2c'] = I2C(scl=mpu['scl'], sda=mpu['sda'])
 accelerometer = accel(mpu['i2c'])
 
+def date_time():
+    (y,mo,d,wd,h,mi,s,*v) = RTC().datetime()
+    (y,mo,d,h,mi,s,wd,yd) = utime.localtime(utime.mktime((y,mo,d,h,mi,s,wd,0))-4*3600)
+    return ('%02d/%02d/%02d' % (mo,d,y-2000), '%02d:%02d:%02d' % (h,mi,s))
+
+def ip():
+    return WLAN(STA_IF).ifconfig()[0]
+
 def output_positions(arg):
     oled.fill(0)
     oled.text('X: %(AcX)+05d' % arg, 5, 5)
     oled.text('Y: %(AcY)+05d' % arg, 5, 15)
     oled.text('Z: %(AcZ)+05d' % arg, 5, 25)
+    (d,t) = date_time()
+    oled.text(d,5,35) 
+    oled.text(t,5,45) 
+    oled.text(ip(),5,55)
     oled.show()
 
-for i in range(0,240):
+def run_cycle():
     output_positions(accelerometer.get_values())
-    time.sleep_ms(250)
+
+timer = Timer(0)
+timer.init(period=1000, mode=Timer.PERIODIC, callback=lambda t:run_cycle())
diff --git a/notes.org b/notes.org
index 495becf..d756fce 100644
--- a/notes.org
+++ b/notes.org
@@ -43,6 +43,50 @@ a.get_values()
 #+END_SRC
 
 
+* Turn off MPU (through vext, also turns off screen)
+#+BEGIN_SRC python
+from machine import Pin
+
+vext = Pin(21, Pin.OUT)
+vext.value(0) # Turns ON Vext
+vext.value(1) # Turns OFF Vext
+#+END_SRC
+
+* Wifi Connection Example, outbound requests.
+
+#+BEGIN_SRC python
+import network
+import machine
+wlan = network.WLAN(network.STA_IF)
+wlan.active(True)
+binary_id = machine.unique_id()
+hostname = 'timeular-{:02x}{:02x}{:02x}{:02x}'.format(binary_id[0],binary_id[1], binary_id[2], binary_id[3])
+wlan.config(dhcp_hostname='timeular')
+wlan.connect("Hart's",'D187wn644GeH')
+wlan.if_config()
+#+END_SRC
+
+* Getting a Unique ID for this instance 
+
+#+BEGIN_SRC python
+import machine
+binary_id=machine.unique_id()
+hex_id = '{:02x}{:02x}{:02x}{:02x}'.format(binary_id[0],binary_id[1],binary_id[2],binary_id[3])
+#+END_SRC
+
+This can be used to append to e.g. the DHCP hostname to make it likely
+to be unique.
+
+* NTP
+
+#+BEGIN_SRC python
+import ntptime
+ntptime.settime()
+import machine
+rtc = machine.RTC()
+rtc.datetime()
+#+END_SRC
+
 * Connections
 
 Pin 23 ESP -> SDA MPU
@@ -50,20 +94,20 @@ Pin 19 ESP -> SCL MPU
 
 MPU AD0 -> - Rail
 MPU GND -> - Rail
-MPU Vcc -> + Rail
+MPU Vcc -> + RailArduino MPU 6050 Serial Monitor
 
 ESP GND -> - Rail
 ESP VEXT -> +Rail
 
-* Things to look at
+* [3/8] Things to look at
 
- - Can we turn off the MPU with VEXT Control? (ESP Pin 21).
- - Connecting to WiFi - Client Mode
- - Connecting to WiFi - Direct Mode
- - BLE?
- - NTP?
- - How to store the data appropriately - Flash/SqlLite, RTC memory?
- - How to retrieve data over WiFi
- - How to detect battery low
+ - [X] Can we turn off the MPU with VEXT Control? (ESP Pin 21).
+ - [X] Connecting to WiFi - Client Mode
+ - [ ] Connecting to WiFi - Direct Mode
+ - [ ] BLE?
+ - [X] NTP?
+ - [ ] How to store the data appropriately - Flash/SqlLite, RTC memory?
+ - [ ] How to retrieve data over WiFi
+ - [ ] How to detect battery low
  - [[https://github.com/tayfunulu/WiFiManager][WiFiManager]]