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--- esp8266-test-boards [2016/05/25 04:37]
livetelevision [AI-Thinker 'Test Board']
+++ esp8266-test-boards [2016/06/16 15:55] (current)
livetelevision [AI-Thinker 'Test Board']
@@ Line 18: / Line 18: @@
 ==== AI-Thinker 'Test Board' ====
-The AI-Thinker board is an evaluation board with an onboard STC15L204EA microcontroller along with a relay, buttons and LEDs on all GPIOs, a relay, a buzzer, LDR, a socket for NRF240 modules, CH340 USB to Serial converter  and DIP switches allowing different IO routing configurations to be setup.  A small adapter board connects the normal ESP8266 modules to a pair of 2x4 headers. The board is widely available from a number of Chinese vendors.
+The AI-Thinker board is an evaluation board with an onboard STC15L204EA microcontroller along with a relay, buttons and LEDs on all GPIOs, a relay, a buzzer, LDR, a socket for NRF240 modules, CH340 USB to Serial converter  and DIP switches allowing different IO routing configurations to be setup.  A small adapter board connects the normal ESP8266 modules to a pair of 2x4 headers. The board is widely available from a number of Chinese vendors, sometimes called a Coexistence Module. This is not the cheaper AI-Thinker "yellow board" (which should have its own entry on this page).
 === DIP Switches ===
@@ Line 45: / Line 45: @@
 | 2       | DL_MCU       | ON=AC relay controlled by MCU                    |
 | 3       | CH_PD_H      | ON=Enable pull up on CH_PD line of ESP8266.      |
-| 4       | GPIO0_L      | ON=Pull ESP8266 GPIO1 down for flashing.         |
+| 4       | GPIO0_L      | ON=Pull ESP8266 GPIO0 down for flashing.         |
 | 5       | GPIO15_L     | ON=Pull ESP8266 GPIO15 down (normal during boot) |
-| 6       | GPIO2_L      | ON=Pull ESP8266 GPIO12 down for ?                |
+| 6       | GPIO2_L      | ON=Pull ESP8266 GPIO2 down for ?                 |
+===Relay===
+Normally open, it can bridge the two AC terminal connections together.  See above for control.  High level closes the relay.  Handles 3 amps at 35v DC or 3 amps at 250v AC.
+===Buzzer===
+Annoying.  Apparently controlled only by MCU?
+===CDS Light Sensor===
+One is installed on the board, connected to the MCU.  Holes for another wired to the ESP8266 ADC are in place but not populated with a sensor presumably because this version breaks out the ADC for independent use.
+===Schematic===
+What is apparently an older version may be found in [[http://www.esp8266.com/viewtopic.php?f=13&t=480|this thread.]]

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