--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/display.py	Thu May 11 15:07:10 2023 -0700
@@ -0,0 +1,45 @@
+import time
+import random
+from machine import Pin, PWM, SPI
+from ST7735 import TFT, TFTColor
+from sysfont import sysfont
+
+
+class Display:
+    def __init__(self):
+        self.lcd_backlight = PWM(Pin(17), freq=20000, duty=1023)
+        self.backlight_level = 0  # to 100
+        self.spi = SPI(1,
+                       baudrate=20000000,
+                       polarity=0,
+                       phase=0,
+                       sck=Pin(5),
+                       mosi=Pin(18))
+        self.tft = TFT(
+            self.spi,
+            aDC=19,
+            aReset=16,  # not connected
+            aCS=21)
+        self.tft.rotation(2)
+        self.tft.initr()
+        self.tft.rgb(True)
+
+        self.tft.fill(TFT.BLACK)
+        # for x in range(0, self.tft.size()[0], 6):
+        #     self.tft.line((0, 0), (x, self.tft.size()[1] - 1),
+        #                   TFTColor(random.randrange(0, 256),
+        #                            random.randrange(0, 256),
+        #                            random.randrange(0, 256)))
+    def startupText(self, row, msg):
+        y1 = (row + 1) * 10
+        self.tft.fillrect((0, y1), (128, 10), TFT.BLACK)
+        self.tft.text((3, y1), msg, TFT.WHITE, sysfont)
+
+    def backlight(self, new, step_sec=0.005):
+        v = self.backlight_level
+        while v != new:
+            v = v + (-1 if v > new else (1 if v < new else 0))
+            self.lcd_backlight.duty(v * 10)
+            self.backlight_level = v
+            time.sleep(step_sec)
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/keys.py	Thu May 11 15:07:10 2023 -0700
@@ -0,0 +1,26 @@
+from machine import Pin
+class Keys:
+    def __init__(self):
+                
+        self.rows = [
+            Pin(23, Pin.OUT),
+            Pin(22, Pin.OUT),
+        ]
+        self.cols = [
+            Pin(36, Pin.IN, pull=-1),  # these don't have internal pullups
+            Pin(39, Pin.IN, pull=-1),
+            Pin(34, Pin.IN, pull=-1),
+            Pin(35, Pin.IN, pull=-1)
+        ]
+        self.prev = ''
+
+    def newKeysDown(self):
+        res = ''
+        for r, rp in enumerate(self.rows):
+            rp.value(0)
+            for c, cp in enumerate(self.cols):
+                res += str(1 - cp())
+            rp.value(1)
+        if res != self.prev:
+            self.prev = res
+            return res
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.py	Thu May 11 15:07:10 2023 -0700
@@ -0,0 +1,85 @@
+'''
+see https://github.com/ustropo/Python_ILI9486/blob/master/Python_ILI9486/ILI9486.py
+
+keyboard:
+key   esp
+---------
+1     35 & pullup
+b     22
+3     34 & pullup
+a     23
+0     39 & pullup
+2     36 & pullup
+
+ST7785:
+esp     lcd
+-----------
+3.3     vcc
+gnd     gnd
+21      cs
+3.3     reset
+19      a0
+18      sda
+5       sdk
+17/tx2  led
+
+======================================================
+
+prev lcd:
+esp   -   LCD
+32   blk  lcd_d1
+33   brn  lcd_d0
+25   red  lcd_d7
+26   orn  lcd_d6
+27   yel  lcd_d5
+14   grn  lcd_d4
+12   blu  lcd_d3
+13   vio  lcd_d2
+
+NC        reset
+NC        3.3v
+5v/VIN    5v
+gnd       gnd
+18        lcd_rd
+5         lcd_wr
+17/TX2    lcd_rs/dc
+16/RX2    lcd_cs
+3.3v      lcd_rst
+NC        f_cs
+'''
+import time
+
+import esp
+from machine import Pin
+
+from net import Net
+from keys import Keys
+from display import Display
+
+# esp.osdebug(None)
+# import gc
+# gc.collect()
+
+display = Display()
+display.startupText(0, "Startup:")
+display.backlight(100)
+
+net = Net()
+net.connect_wifi(display.startupText)
+net.connect_mqtt(display.startupText)
+display.backlight(50)
+keys = Keys()
+
+while True:
+    net.mqtt_poll()
+    r = keys.newKeysDown()
+    if r is not None:
+        net.send('7key/sensor', r)
+        last_message = time.time()
+
+print("go2")
+blue_led = Pin(2, Pin.OUT)
+print(res)
+blue_led(1)
+time.sleep(.05)
+blue_led(0)
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/net.py	Thu May 11 15:07:10 2023 -0700
@@ -0,0 +1,43 @@
+import network
+import secrets
+from umqttsimple import MQTTClient
+
+
+class Net:
+    def connect_wifi(self, status):
+        status(1, "wifi: ")
+        station = network.WLAN(network.STA_IF)
+        station.active(True)  # activate the interface
+        status(1, "wifi: on")
+
+        station.connect(secrets.ssid, secrets.wifi_pass)
+        status(1, "wifi: on/connect")
+
+        while station.isconnected() == False:
+            pass
+
+        status(1, "wifi: on/connect/ok")
+
+    def connect_mqtt(self, status):
+        client_id = '7key'
+        status(2, "mqtt: ")
+        self.client = MQTTClient(client_id, secrets.mqtt_broker)
+
+        self.client.set_callback(self.on_subscribed_msg)
+        status(2, "mqtt: connect")
+        self.client.connect()
+        status(2, "mqtt: connect/ok")
+
+    def subscribe(self, topic, cb):
+        self.client.subscribe(topic)
+
+    def on_subscribed_msg(self, topic, msg):
+        print('mqtt ->', (topic, msg))
+        if topic == b'notification' and msg == b'received':
+            print('ESP received hello message')
+
+    def mqtt_poll(self):
+        self.client.check_msg()
+
+    def send(self, topic, msg):
+        self.client.publish(topic.encode('ascii'), msg.encode('ascii'))