Has anyone successfully bypassed these remotes so they can be controlled by a wall switch?
No. I have read about a take apart of the RF transmitter such that you can automate it.
Here utilizing a few Hampton Bay ceiling fans. These have pull chains and RF remotes to them. Today I only utilize a UPB switch on the lamp side.
I have taken apart one fan and its just an RF module plus the analog pieces.
I have read of DIY combination automation of the RF remotes (involves a take apart) of a remote and being able to replicate the RF signals.
Misterhouse Hampton Bay RF Fan Control
I guess there is a standard relating to the RF commands and I am thinking it is or was 303.875MHz
The newer RF remote controllers also now utilize temperature settings.
Found
this.
#
# brand: Hampton Bay
# model: UC7078T
# supported devices: Ceiling fan. Requires 303.875MHz RF transmitter
#
# Other Hampton Bay fans have similar remotes, but have no "Up Light",
# and the remote has a "Fan Forward/Reverse" button. I suspect these
# remotes would use the same codes, at least for the buttons that are
# common.
#
# The remotes use a Tiro wireless encoder/decoder set. I know the
# encoder is the M1E, but haven't cracked open the receiver to check
# the decoder. The datasheet for the M1D-95 has the pinout of the M1E,
# but that particular decoder is for a remote doorbell application.
# It can be found at
# http://www.tiro.cc/datasheet/doorbell/M1D-95.pdf
# I believe the decoder that is used has fewer address bits (they must
# be matched for outputs to be driven) and more data bits, since I am
# seeing 5 data bits driven, but the datasheet only shows 4.
#
# I looked up the FCC id on the back of the remote (CHQ8BT7078T) to
# determine the frequency of the remote (303.875MHz) at
# http://www.fcc.gov/oet/fccid/
# and ordered the transmitter from Computronics in Australia
# http://computronics.com.au/module/txrxpair/
#
begin remote
name UC7078T
bits 7
flags SPACE_FIRST|REVERSE
eps 30
aeps 100
pre_data_bits 4
# Hex value of 4 dip switch code settings
pre_data 0x0b
header 400 300
plead 700
# Even though space is sent first, pulse length is still
# specified first.
zero 300 700
one 700 300
min_repeat 5
gap 12000
begin codes
KEY_LIGHTS_TOGGLE 0x48 # Was: LIGHT_UP
FAN_HIGH 0x02
FAN_MED 0x04
FAN_LOW 0x08
FAN_OFF 0x20
KEY_LIGHTS_TOGGLE 0x40 # Was: LIGHT_DOWN
end codes
end remote
How do I figure out the frequency range of my device?
You can go to the FCC govt site
http://transition.fcc.gov/oet/ea/fccid/9 And lookup your device's FCC ID.
The Hampton Bay fan remotes and similar devices such as RF controlled outlets, more popular in Europe, are an example of devices we are interested in supporting. These are covered by FCC Part 15, Subpart C, section 231
No hum fan speed controller