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Fix bandwidth calculation in calculate_airtime method for accurate airtime estimation

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Lloyd
2026-02-08 09:44:20 +00:00
parent 076d87dcde
commit ded15ea43d
1 changed files with 3 additions and 3 deletions
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repeater/airtime.py
+3 -3
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@@ -53,17 +53,17 @@ class AirtimeManager:
Airtime in milliseconds
"""
sf = spreading_factor or self.spreading_factor
bw_khz = (bandwidth_hz or self.bandwidth) / 1000
bw_hz = (bandwidth_hz or self.bandwidth)
cr = coding_rate or self.coding_rate
preamble_len = preamble_len or self.preamble_length
crc = 1 if crc_enabled else 0
h = 0 if explicit_header else 1 # H=0 for explicit, H=1 for implicit
# Low data rate optimization: required for SF11/SF12 at 125kHz
de = 1 if (sf >= 11 and bandwidth_hz <= 125000) else 0
de = 1 if (sf >= 11 and bw_hz <= 125000) else 0
# Symbol time in milliseconds: T_sym = 2^SF / BW_kHz
t_sym = (2 ** sf) / bw_khz
t_sym = (2 ** sf) / (bw_hz / 1000)
# Preamble time: T_preamble = (n_preamble + 4.25) * T_sym
t_preamble = (preamble_len + 4.25) * t_sym