# Board 

![board](emonth_V2.0.1_brd.png)

# Schematic 

![emonTH V2 schematic](emonth_V2.0.1_sch.png)

# Change log

## V2.0.1 (Aug 2016)

- Add SI7201 temperature & humidity sensor (see `si7021_eval` folder in emonth2 repo)
- Re-jig port map from emonTH V1.5 to make available I2C pins for SI7021

# Port Map

|                |           |            |                       |                       | 
|----------------|-----------|------------|-----------------------|-----------------------| 
| Arduino        | ATmega328 | Function   | emonTH V1.5           | emonTH V2             | 
| Analog 0 (D14) | PC0       |            |                       |                       | 
| Analog 1 (D15) | PC1       |            | 2x AA Battery Voltage | 2x AA Battery Voltage | 
| Analog 2 (D16) | PC2       |            |                       | DHT22 Data            | 
| Analog 3 (D17) | PC3       |            |                       | DS18B20 One-wire Data | 
| Analog 4 (D18) | PC4       | (SDA)      | DHT22 Data            | SI7021 SDA (Data)     | 
| Analog 5 (D19) | PC5       | (SCL)      | DS18B20 One-wire Data | SI7021 SCL (SCK)      | 
| Analog 6 (D20) |           |            |                       |                       | 
| Analog 7 (D21) |           |            |                       |                       | 
| Digital 0      | PD0       | (RXD)      | FTDI Tx               | FTDI Tx               | 
| Digital 1      | PD1       | (TXD)      | FTDI Rx               | FTDI Rx               | 
| Digital 2      | PD2       | (int0) PWM | RFM12B IRQ            | RFM69CW IRQ           | 
| Digital 3      | PD3       | (int1) PWM | Terminal block        | Terminal block        | 
| Digital 4      | PD4       |            |                       |                       | 
| Digital 5      | PD5       | PWM        | DS18B20 PWR           | DS18B20 PWR           | 
| Digital 6      | PD6       | PWM        | DHT22 PWR             | DHT22 PWR             | 
| Digital 7      | PD7       |            | DIP 1                 | DIP 1                 | 
| Digital 8      | PB0       |            | DIP 2                 | DIP 2                 | 
| Digital 9      | PB1       | PWM        | LED                   | LED                   | 
| Digital 10     | PB2       | (SS) PWM   | RFM12B SEL            | RFM69CW SEL           | 
| Digital 11     | PB3       | (MOSI) PWM | RFM12 SDI             | RFM69CW SDI           | 
| Digital 12     | PB4       | (MISO)     | RFM12 SDO             | RFM69CW SDO           | 
| Digital 13     | PB5       | (SCK)      | RFM12 SCK             | RFM69CW SCK           | 


# BOM

| "Qty" | "Value"                   | "Device"                  | "Package"            | "Parts"           | "Description"                                                             | "" |  | 
|-------|---------------------------|---------------------------|----------------------|-------------------|---------------------------------------------------------------------------|----|--| 
| "1"   | ""                        | "ANTENNA"                 | "PAD-01"             | "ANT1"            | "Antenna"                                                                 | "" |  | 
| "1"   | ""                        | "LEDCHIPLED-0603-TTW"     | "CHIPLED-0603-TTW"   | "LED"             | "LED"                                                                     | "" |  | 
| "4"   | "0.1uF"                   | "C-EUC0603"               | "C0603"              | "C3, C6, C8, C12" | "CAPACITOR, European symbol"                                              | "" |  | 
| "2"   | "0R"                      | "R-EU_R0603"              | "R0603"              | "R2, R3"          | "RESISTOR, European symbol"                                               | "" |  | 
| "1"   | "100K"                    | "R-EU_R0603"              | "R0603"              | "R5"              | "RESISTOR, European symbol"                                               | "" |  | 
| "2"   | "100nF"                   | "C-EUC0603"               | "C0603"              | "C9, C10"         | "CAPACITOR, European symbol"                                              | "" |  | 
| "1"   | "10K"                     | "R-EU_R0603"              | "R0603"              | "R1"              | "RESISTOR, European symbol"                                               | "" |  | 
| "1"   | "10K"                     | "R-US_R0603"              | "R0603"              | "R32"             | "RESISTOR, American symbol"                                               | "" |  | 
| "1"   | "10uF"                    | "C-EUC0603"               | "C0603"              | "C5"              | "CAPACITOR, European symbol"                                              | "" |  | 
| "1"   | "10uH"                    | "INDUCTOR1210"            | "1210"               | "L1"              | "Inductors"                                                               | "" |  | 
| "1"   | "16Mhz"                   | "CRYSTALHC49UP"           | "HC49UP"             | "Q1"              | "CRYSTAL"                                                                 | "" |  | 
| "1"   | "1K"                      | "R-EU_R0603"              | "R0603"              | "R10"             | "RESISTOR, European symbol"                                               | "" |  | 
| "3"   | "1X2-3.5MM"               | "1X2-3.5MM"               | "1X2-3.5MM"          | "J1, J2, J3"      | "3.5mm Terminal block"                                                    | "" |  | 
| "3"   | "1uF"                     | "C-EUC0603"               | "C0603"              | "C1, C2, C4"      | "CAPACITOR, European symbol"                                              | "" |  | 
| "2"   | "22pF"                    | "C-EUC0603"               | "C0603"              | "C7, C11"         | "CAPACITOR, European symbol"                                              | "" |  | 
| "1"   | "2_SMT_DIP_SWITCH"        | "2_SMT_DIP_SWITCH"        | "DIP_SWITCH_SMT"     | "S3"              | "Multicomp MCEMR-02-T"                                                    | "" |  | 
| "1"   | "2x3"                     | "AVR_SPI_PRG_6PTH"        | "2X3"                | "ISP"             | "AVR ISP 6 Pin"                                                           | "" |  | 
| "1"   | "3V"                      | "3X_AAA_BATTERY_HOLDER"   | "AAA_PCB_HOLDER"     | "U$3"             | "2x AA Battery Holder"                                                    | "" |  | 
| "3"   | "4K7"                     | "R-EU_R0603"              | "R0603"              | "R4, R6, R24"     | "RESISTOR, European symbol"                                               | "" |  | 
| "1"   | "ATMEGA168MLF"            | "ATMEGA168MLF"            | "MLF32"              | "U1_MLF"          | "Atmel 32-pin 8-bit micro, 16k flash."                                    | "" |  | 
| "1"   | "ATMEGA328P"              | "ATMEGA328_SMT"           | "TQFP32-08"          | "U1_TQFP"         | "32-Pin Atmega328 part"                                                   | "" |  | 
| "1"   | "DS18B20"                 | "TRANSISTOR_NPNTO92"      | "TO-92"              | "Q2"              | "Transistor NPN"                                                          | "" |  | 
| "3"   | "FIDUCIAL"                | "FIDUCIAL"                | "FIDUCIAL_1MM"       | "U$1, U$6, U$7"   | "For use by pick and place machines to calibrate the vision/machine, 1mm" | "" |  | 
| "1"   | "FTDI"                    | "FTDI_BASICPTH"           | "FTDI_BASIC"         | "JP1"             | "FTDI Basic: 3.3V and 5V"                                                 | "" |  | 
| "1"   | "LTC3525ESC6-3.3TRMPBF"   | "LTC3525ESC6-3.3TRMPBF"   | "SOT65P210X100-6N"   | "U1"              | "Step-Up DC/DC Converter"                                                 | "" |  | 
| "1"   | "OSHW_LOGO_10MILX0200-NT" | "OSHW_LOGO_10MILX0200-NT" | "OSHW_10X200_NOTEXT" | "LOGO2"           | ""                                                                        | "" |  | 
| "1"   | "RF-LINK_TX"              | "RF-LINK_TX"              | "RF-LINK_TX"         | "U$2"             | ""                                                                        | "" |  | 
| "1"   | "RFM12B"                  | "RFM12B"                  | "RFM12B"             | "RFM69CW"         | ""                                                                        | "" |  | 
| "1"   | "SI7021"                  | "SI7021"                  | "SI7021"             | "U2"              | "The Si7021 is an I2C Humidity and Temperature Sensor"                    | "" |  | 
| "1"   | "SMA_EDGE"                | "SMA_EDGE"                | "SMA-EDGE"           | "J$1"             | "SMA Antenna Connector"                                                   | "" |  | 
| "1"   | "SOLDERJUMPERNO"          | "SOLDERJUMPERNO"          | "SJ_2S-NO"           | "SJ1"             | "Solder Jumper"                                                           | "" |  | 
| "1"   | "TOREX XC6206P332MR"      | "MCP1700T-3302E/TT"       | "SOT95P237X112-3N"   | "VREG"            | "Low Quiescent Current LDO"                                               | "" |  | 
| "1"   | "USB-MINIB-5PIN"          | "USB-MINIB-5PIN"          | "USB-MINIB-CISECO"   | "U$5"             | "Mini-USB "B" connector with 5th pin broken out."                         | "" |  |