ESP8266 DAQ - Revision history

WikiSysop: /* Total Project Cost */

2015-08-21T00:46:16Z

Total Project Cost

← Older revision		Revision as of 00:46, 21 August 2015
Line 94:		Line 94:

	\|AP1117		\|AP1117
	\|$0.27		\|$0.28
	\|[http://www.mouser.com/Search/ProductDetail.aspx?R=AP1117IE33G-13 Mouser]		\|[http://www.mouser.com/Search/ProductDetail.aspx?R=AP1117IE33G-13 Mouser]
	\|- style="text-align:left;"		\|- style="text-align:left;"

	\|Passives/Misc. Components		\|Passives/Misc. Components
	\|$0.25		\|$0.50
	\|[http://www.digikey.com/ Digi-Key]		\|[http://www.digikey.com/ Digi-Key]
	\|- style="color:red;text-align:left;"		\|- style="color:red;text-align:left;"

	\|Total Price		\|Total Price
	\|~$13.68		\|~$13.94
	\|		\|
	\|-		\|-

	\|}		\|}

WikiSysop: /* Total Project Cost */

2015-08-10T23:35:29Z

Total Project Cost

← Older revision		Revision as of 23:35, 10 August 2015
Line 101:		Line 101:
	\|$0.25		\|$0.25
	\|[http://www.digikey.com/ Digi-Key]		\|[http://www.digikey.com/ Digi-Key]
	\|- style="text-align:left;"		\|- style="color:red;text-align:left;"

	\|Total Price		\|Total Price

WikiSysop: /* Code */

2015-08-10T23:34:24Z

Code

← Older revision		Revision as of 23:34, 10 August 2015
Line 58:		Line 58:
	==Code==		==Code==

	~~Full source code~~ for ~~the project can be found here~~: http://rev0proto.com/files/ESP8266_DAQ.~~zip~~		Basic project template for connecting to Wi-Fi access point (SSID and WPA2 key hard-coded) and posting temperature/humidity + single ADC channel to a Thingspeak channel: http://rev0proto.com/files/ESP8266_DAQ.ino

	==Photos==		==Photos==

WikiSysop: /* List of Features */

2015-08-10T23:32:51Z

List of Features

← Older revision		Revision as of 23:32, 10 August 2015
Line 5:		Line 5:
	==List of Features==		==List of Features==

	* 802.11b/g/n Wi-Fi ~~enabled~~		* 802.11b/g/n Wi-Fi
	* 32-bit 80 MHz RISC CPU		* 32-bit 80 MHz RISC CPU
	* 512kB(?) Flash for program/data storage		* 512kB(?) Flash for program/data storage

WikiSysop: /* PCB Files */

2015-08-10T23:31:44Z

PCB Files

← Older revision		Revision as of 23:31, 10 August 2015
Line 47:		Line 47:
	====PCB Files====		====PCB Files====
	Here is the Eagle schematic file for the ESP8266 DAQ: http://rev0.net/files/wifi_ws_v10.sch		Here is the Eagle schematic file for the ESP8266 DAQ: http://rev0.net/files/wifi_ws_v10.sch

	Here is the Eagle board file for the ESP8266 DAQ: http://rev0.net/files/wifi_ws_v10.brd		Here is the Eagle board file for the ESP8266 DAQ: http://rev0.net/files/wifi_ws_v10.brd

WikiSysop at 23:30, 10 August 2015

2015-08-10T23:30:32Z

← Older revision		Revision as of 23:30, 10 August 2015
Line 1:		Line 1:
	This is a project to create a Wi-Fi enabled data collection unit supporting an 8-channel 12-bit ADC (MAX11629), DHT-11/22 temperature/humidity sensor, MQ-135 air quality sensor, 2 CPU fan or servo outputs, SPI and UART interfaces, and is expandable to support a LiPo battery with on-board charging circuit. This project is based around an ESP-12E module, utilizing the ESP8266 Wi-Fi SOC which performs all Wi-Fi protocol processing and contains a general purpose MCU compatible with the Arduino IDE.		This is a project to create a Wi-Fi enabled data collection unit supporting an 8-channel 12-bit ADC (MAX11629), DHT-11/22 temperature/humidity sensor, MQ-135 air quality sensor, 2 CPU fan or servo outputs, SPI and UART interfaces, and is expandable to support a LiPo battery with on-board charging circuit. This project is based around an ESP-12E module, utilizing the ESP8266 Wi-Fi SOC which performs all Wi-Fi protocol processing and contains a general purpose MCU compatible with the Arduino IDE.

	[[File:ESP8266_DAQ~~.png~~.jpg\|thumb\|right\|ESP8266 DAQ with environmental sensors.]]		[[File:ESP8266_DAQ.jpg\|thumb\|right\|ESP8266 DAQ with environmental sensors.]]

	==List of Features==		==List of Features==

WikiSysop: /* Total Project Cost */

2015-08-10T23:29:55Z

Total Project Cost

← Older revision		Revision as of 23:29, 10 August 2015
Line 85:		Line 85:
	\|$4.50		\|$4.50
	\|[http://www.mouser.com/Search/ProductDetail.aspx?R=FT232RL-REEL Mouser]		\|[http://www.mouser.com/Search/ProductDetail.aspx?R=FT232RL-REEL Mouser]
	\|- text-align:left;"		\|- style="text-align:left;"

	\|MAX11629		\|MAX11629
	\|$3.93		\|$3.93
	\|[http://www.mouser.com/Search/ProductDetail.aspx?R=MAX11629EEE Mouser]		\|[http://www.mouser.com/Search/ProductDetail.aspx?R=MAX11629EEE Mouser]
	\|- text-align:left;"		\|- style="text-align:left;"

	\|AP1117		\|AP1117
	\|$0.27		\|$0.27
	\|[http://www.mouser.com/Search/ProductDetail.aspx?R=AP1117IE33G-13 Mouser]		\|[http://www.mouser.com/Search/ProductDetail.aspx?R=AP1117IE33G-13 Mouser]
	\|- text-align:left;"		\|- style="text-align:left;"

	\|Passives/Misc. Components		\|Passives/Misc. Components
	\|$0.25		\|$0.25
	\|[http://www.digikey.com/ Digi-Key]		\|[http://www.digikey.com/ Digi-Key]
	\|- text-align:left;"		\|- style="text-align:left;"

	\|Total Price		\|Total Price

WikiSysop: /* Electronics */

2015-08-10T23:29:20Z

Electronics

← Older revision		Revision as of 23:29, 10 August 2015
Line 24:		Line 24:
	This board contains the necessary circuitry to re-program the ESP8266 with the Arduino bootloader and program/debug through the Arduino IDE. The board also adds environmental sensing capability (temperature and humidity via the DHT-11 or DHT-22 sensor and air quality/CO2 via an MQ-135) and an 8-channel ADC. The GPIOs are mapped as follows:		This board contains the necessary circuitry to re-program the ESP8266 with the Arduino bootloader and program/debug through the Arduino IDE. The board also adds environmental sensing capability (temperature and humidity via the DHT-11 or DHT-22 sensor and air quality/CO2 via an MQ-135) and an 8-channel ADC. The GPIOs are mapped as follows:

	* TOUT (ADC) - MQ135		* '''TOUT (ADC)''' - MQ135
	* TX - Serial Interface		* '''TX''' - Serial Interface
	* RX - Serial Interface		* '''RX''' - Serial Interface
	* GPIO0 - Bootloader Dedicated		* '''GPIO0''' - Bootloader Dedicated
	* GPIO2 - DHT-11/22		* '''GPIO2''' - DHT-11/22
	* GPIO4 - Fan/Servo 1		* '''GPIO4''' - Fan/Servo 1
	* GPIO5 - Fan/Servo 2		* '''GPIO5''' - Fan/Servo 2
	* GPIO12 - SPI MISO		* '''GPIO12''' - SPI MISO
	* GPIO13 - SPI MOSI		* '''GPIO13''' - SPI MOSI
	* GPIO14 - SPI SCLK		* '''GPIO14''' - SPI SCLK
	* GPIO15 - SPI CS (ADC)		* '''GPIO15''' - SPI CS (ADC)
	* GPIO16 - SPI CS2 (External SPI device)		* '''GPIO16''' - SPI CS2 (External SPI device)

	===Hardware Revisions===		===Hardware Revisions===

WikiSysop at 23:28, 10 August 2015

2015-08-10T23:28:17Z

← Older revision		Revision as of 23:28, 10 August 2015
Line 1:		Line 1:
	This is a project to create a Wi-Fi enabled data collection unit supporting an 8-channel 12-bit ADC (MAX11629), DHT-11/22 temperature/humidity sensor, MQ-135 air quality sensor, ~~supports~~ 2 CPU fan or servo outputs, ~~as well as a single~~ SPI and UART ~~interface~~, and is expandable to support a LiPo battery with on-board charging circuit. This project is based around an ESP-12E module, utilizing the ESP8266 Wi-Fi SOC which performs all Wi-Fi protocol processing and contains a general purpose MCU compatible with the Arduino IDE.		This is a project to create a Wi-Fi enabled data collection unit supporting an 8-channel 12-bit ADC (MAX11629), DHT-11/22 temperature/humidity sensor, MQ-135 air quality sensor, 2 CPU fan or servo outputs, SPI and UART interfaces, and is expandable to support a LiPo battery with on-board charging circuit. This project is based around an ESP-12E module, utilizing the ESP8266 Wi-Fi SOC which performs all Wi-Fi protocol processing and contains a general purpose MCU compatible with the Arduino IDE.

	[[File:ESP8266_DAQ.png.jpg\|thumb\|right\|ESP8266 DAQ with environmental sensors.]]		[[File:ESP8266_DAQ.png.jpg\|thumb\|right\|ESP8266 DAQ with environmental sensors.]]
Line 5:		Line 5:
	==List of Features==		==List of Features==

	*		* 802.11b/g/n Wi-Fi enabled
	* ~~LED indicators~~		* 32-bit 80 MHz RISC CPU
	* Re-~~programmable~~ and ~~rechargable via~~ micro-~~USB~~ (~~FT-232RL IC~~)		* 512kB(?) Flash for program/data storage
			* ~38kB Free SRAM
			* Uses Arduino IDE
			* On-board FT232RL for reprogramming and UART comms
			* micro USB connector for power/communication
			* 8 channel 12-bit ADC with RC input filter on each channel
			* Support for DHT-11/DHT-22 and MQ-135 for environmental sensing (temperature/humidity/air quality)
			* LED indicators
	* Support for LiPo battery with internal charging circuit		* Support for LiPo battery with internal charging circuit

Line 13:		Line 20:

	[[File:ESP8266_DAQ_Schematic.png\|thumb\|right\|The complete system schematic for the ESP8266 DAQ.]]		[[File:ESP8266_DAQ_Schematic.png\|thumb\|right\|The complete system schematic for the ESP8266 DAQ.]]
			[[File:ESP8266_DAQ_PCB.png\|thumb\|right\|The PCB layout (top: red, bottom: blue) for the ESP8266 DAQ.]]

			This board contains the necessary circuitry to re-program the ESP8266 with the Arduino bootloader and program/debug through the Arduino IDE. The board also adds environmental sensing capability (temperature and humidity via the DHT-11 or DHT-22 sensor and air quality/CO2 via an MQ-135) and an 8-channel ADC. The GPIOs are mapped as follows:

	~~===Microcontroller and LCD===~~		* TOUT (ADC) - MQ135
	~~[[File:ESP8266_DAQ_PCB.png\|thumb\|right\|The PCB layout~~ (~~top: red, bottom: blue~~) ~~for the ESP8266 DAQ.]]~~		* TX - Serial Interface
	In the simplest case, a digital Geiger counter would need only two functions, to count the pulses from the Geiger tube and calculate a rate, and to display the rate on the LCD. This project simply adds a few extra features, all very simple to implement.		* RX - Serial Interface
	First, the microcontroller needs to be able to count pulses from the Geiger tube over a certain time period. This is accomplished by running a timer divided down from a 24 MHz crystal. Pulses are detected by the microcontroller's hardware via a falling edge interrupt, which increments the ticks variable. The timer module produces an interrupt 50 times a second. Every second the microcontroller records how many pulses were detected since the last interrupt, and this value is added to an array of 32 values each 0.3s, which are averaged and displayed.		* GPIO0 - Bootloader Dedicated
	~~Next, the microcontroller needs to display values and text to the screen. This is achieved by sending binary data over an SPI data interface. An LCD function library handles the low~~-~~level conversion between ASCII characters from strings or numbers in variables to characters to be displayed to the LCD.~~		* GPIO2 - DHT-11/22
	~~The microcontroller reads battery voltage and displays it as an 8~~-~~level bar graph. The microcontroller also optionally displays conversions in uSv~~/~~H and mR~~/~~H, and displays the corresponding accumulated dose~~ (~~uSv in CPM mode~~)~~. The microcontroller also maps the CPM value to a logarithmic bar graph, which is displayed in the middle of the screen.~~		* GPIO4 - Fan/Servo 1
			* GPIO5 - Fan/Servo 2
			* GPIO12 - SPI MISO
			* GPIO13 - SPI MOSI
			* GPIO14 - SPI SCLK
			* GPIO15 - SPI CS (ADC)
			* GPIO16 - SPI CS2 (External SPI device)

	===Hardware Revisions===		===Hardware Revisions===
Line 27:		Line 43:

	'''Outstanding Issues:'''		'''Outstanding Issues:'''
	* ~~...~~		* None yet!

	====PCB Files====		====PCB Files====
Line 54:		Line 70:
	\|Cost		\|Cost
	\|Source		\|Source
	\|- style="color:~~gray~~;text-align:left;"		\|- style="color:navy;text-align:left;"

	\|ESP-12E Module		\|ESP-12E Module
	\|$3.33		\|$3.33
	\|[http://www.ebay.com/itm/131497630292 eBay]		\|[http://www.ebay.com/itm/131497630292 eBay]
	\|- style="color:~~gray~~;text-align:left;"		\|- style="color:green;text-align:left;"

	\|PCB		\|PCB
	\|$1.40		\|$1.40
	\|[http://dirtypcbs.com/view.php?share=9435&accesskey=848559057f2751938392fce76a20d490 DirtyPCBs]		\|[http://dirtypcbs.com/view.php?share=9435&accesskey=848559057f2751938392fce76a20d490 DirtyPCBs]
	\|- style="color:~~maroon~~;text-align:left;"		\|- style="color:black;text-align:left;"

	\|FT-232-RL		\|FT-232-RL
	\|$4.50		\|$4.50
	\|[http://www.mouser.com/Search/ProductDetail.aspx?R=FT232RL-REEL Mouser]		\|[http://www.mouser.com/Search/ProductDetail.aspx?R=FT232RL-REEL Mouser]
	\|- ~~style="color:navy;~~text-align:left;"		\|- text-align:left;"

	\|MAX11629		\|MAX11629
	\|$3.93		\|$3.93
	\|[http://www.mouser.com/Search/ProductDetail.aspx?R=MAX11629EEE Mouser]		\|[http://www.mouser.com/Search/ProductDetail.aspx?R=MAX11629EEE Mouser]
	\|- ~~style="color:navy;~~text-align:left;"		\|- text-align:left;"

	\|AP1117		\|AP1117
	\|$0.27		\|$0.27
	\|[http://www.mouser.com/Search/ProductDetail.aspx?R=AP1117IE33G-13 Mouser]		\|[http://www.mouser.com/Search/ProductDetail.aspx?R=AP1117IE33G-13 Mouser]
	\|- ~~style="color:navy;~~text-align:left;"		\|- text-align:left;"

	\|Passives/Misc. Components		\|Passives/Misc. Components
	\|$0.25		\|$0.25
	\|[http://www.digikey.com/ Digi-Key]		\|[http://www.digikey.com/ Digi-Key]
	\|- ~~style="color:red;~~text-align:left;"		\|- text-align:left;"

	\|Total Price		\|Total Price

WikiSysop at 22:49, 10 August 2015

2015-08-10T22:49:33Z

← Older revision		Revision as of 22:49, 10 August 2015
Line 15:		Line 15:

	===Microcontroller and LCD===		===Microcontroller and LCD===
	[[File:ESP8266_DAQ_PCB~~.png~~.png\|thumb\|right\|The PCB layout (top: red, bottom: blue) for the ESP8266 DAQ.]]		[[File:ESP8266_DAQ_PCB.png\|thumb\|right\|The PCB layout (top: red, bottom: blue) for the ESP8266 DAQ.]]
	In the simplest case, a digital Geiger counter would need only two functions, to count the pulses from the Geiger tube and calculate a rate, and to display the rate on the LCD. This project simply adds a few extra features, all very simple to implement.		In the simplest case, a digital Geiger counter would need only two functions, to count the pulses from the Geiger tube and calculate a rate, and to display the rate on the LCD. This project simply adds a few extra features, all very simple to implement.
	First, the microcontroller needs to be able to count pulses from the Geiger tube over a certain time period. This is accomplished by running a timer divided down from a 24 MHz crystal. Pulses are detected by the microcontroller's hardware via a falling edge interrupt, which increments the ticks variable. The timer module produces an interrupt 50 times a second. Every second the microcontroller records how many pulses were detected since the last interrupt, and this value is added to an array of 32 values each 0.3s, which are averaged and displayed.		First, the microcontroller needs to be able to count pulses from the Geiger tube over a certain time period. This is accomplished by running a timer divided down from a 24 MHz crystal. Pulses are detected by the microcontroller's hardware via a falling edge interrupt, which increments the ticks variable. The timer module produces an interrupt 50 times a second. Every second the microcontroller records how many pulses were detected since the last interrupt, and this value is added to an array of 32 values each 0.3s, which are averaged and displayed.
Line 24:		Line 24:

	====Revision 1.0====		====Revision 1.0====
	This is the first revision of the ~~GC-D 1000~~.		This is the first revision of the ESP8266 DAQ.

	~~'''PCB:'''~~
	* Geiger tube signal routed to input pin with edge triggered interrupt
	* USB port moved lower to accomodate enclosure design
	* Voltage sense pin tied directly to VBAT allowing voltage read when switched off but plugged in (charging)
	* <s>Added auto power-off capability (MCU signal to boost EN line)</s> Removed, battery monitor should be sufficient.
	* Added LiPo battery monitor circuit

	~~'''Enclosure:'''~~
	* Added space at top of enclosure for second SI3BG size (short/wide vs. thin/long)
	* Increased clearance along edge seal for better fit
	* Increased tolerances for better fit of PCB and edge snaps
	* Modified magnet holders
	* Improved buttons to add reach and fit in holes
	* Increased hole size for PUR button access (USB program button)
	* Minor cosmetic/structural improvements

	'''Outstanding Issues:'''		'''Outstanding Issues:'''
	* ~~The buttons are currently not manufacturable by Shapeways~~. ~~They must be redesigned (a rectangular slot/profile would be a better approach) to have increased wall thickness~~.		* ...

	====PCB Files====		====PCB Files====
	Here is the Eagle schematic file for the ESP8266 DAQ: http://rev0.net/files/.sch		Here is the Eagle schematic file for the ESP8266 DAQ: http://rev0.net/files/wifi_ws_v10.sch
	Here is the Eagle board file for the ESP8266 DAQ: http://rev0.net/files/.brd		Here is the Eagle board file for the ESP8266 DAQ: http://rev0.net/files/wifi_ws_v10.brd

	==Enclosure==		==Enclosure==

	The enclosure for the ~~GC-D 1000~~ was created with Autodesk Inventor 3D CAD software, and is 3D printed (in this case using a Makerbot Replicator 2). The enclosure is made of 5 separate pieces, which are assembled by snapping them together.		The enclosure for the ESP8266 DAQ was created with Autodesk Inventor 3D CAD software, and is 3D printed (in this case using a Makerbot Replicator 2). The enclosure is made of 2 separate pieces, which are assembled by snapping them together.

	Here are the Autodesk Inventor files for the ~~GC-D 1000~~: http://rev0proto.com/files/~~GC-D_1000_Model~~.zip		Here are the Autodesk Inventor files for the enclosure: http://rev0proto.com/files/ESP8266_Enclosure.zip

	==Code==		==Code==

	Full source code for the project can be found here: http://rev0proto.com/files/~~gc-d_1000~~.zip		Full source code for the project can be found here: http://rev0proto.com/files/ESP8266_DAQ.zip

	==Photos==		==Photos==
	<gallery widths=180px heights=120px perrow=4>		<gallery widths=180px heights=120px perrow=4>
	File:~~GC-D_1000_Top_Handheld.jpg\|...~~		File:ESP8266_DAQ_Top.jpg\|...
	~~File:GC-D_1000_Top~~.jpg\|...
	</gallery>		</gallery>