v0.5.0

Updates

1. Removed Ground Planes from Top and Bottom layers.
   • I noticed that after the device came on, it should slowly rise in temperature before smoothing out. The device would also become noticeably warm as the ESP module output a bit of heat, which quickly spread across the ground planes and into the AHT10.
   • I wired all of the Ground pins together, using 15mil traces, matching the 3.3v traces.
2. Moved location of voltage divider resistors
3. Made pins breadboard compatible. Pins would need to be soldered upside down
   • Width of the board was made to be 900mm, which should be enough room for 1 row on either side.
   • Gaps between I2C/PWR and ADC/PWR pins set to increments of 100mil to fit in a breadboard
4. Removed grounding from the USB header
5. Made the pads on the BH1750 wider
   • This is in an attempt to have more solder paste be applied to the pads, making it more likely to have it wick onto the pins

v0.4.0

Updates

1. Changed R6 from 4.7k to 1k resistor to match datasheet
2. Remade traces around BH1750 to attempt to help fix bad placement on PCBs
3. Extended Solder and Paste mask on BH1750 to allow more room for pins to make contact
   • Noticed in off-the-shelf boards that the pins have a lot of room, where as the default footprint had only the exact room it needed, leaving very little room for error.
4. Moved capacitors closer to the ESP
5. Removed the excess amounts of ground vias and useless islands
   • Should help with the reflow soldering as a ton of vias dissipate heat throughout the board, making it harder to get heat into the components.
   • Removal of islands removes thermal mass
6. Gave the board rounded edges! Looks much prettier :)
7. Added a voltage divider to allow for measuring the input voltage
   • Voltage divider can be connected to the Analog pin by soldering the pads together

v0.3.0

Added pins to breakout power and ground pins

v0.2.0

Added

• Pin headers for I2C
• Pin headers for the ESP8266 Analog pin
• Updated many trace paths
• Added BOM & Pick And Place files to the Release notes

v0.1.2

Added breakout pads

• ADC
• SDA
• SCL
  Added two solder pads for collecting the WAKE and RST pin to allow for waking from Deep Sleep

v0.1.1

Updated PCB to have the ESP module be fully contained on the board to help with JLCPCB's pick and place machines.
Added holes to the corners of the board

v0.1

The initial design of the ESPHub board. Still in testing and has not been physically made yet.